Among arguments from earlier scripture, the mention of Kedar and Nebaioth in Isaiah is one of the more interesting - and also one of the easiest to overstate. A careful Muslim case should not claim that Isaiah plainly says "Muhammad" or "Islam" in these verses. It does not. But the verses do place Ishmael's Arabian descendants inside a future scene of God's praise and accepted worship, and that is significant.

This article will present the argument in its strongest form, then the strongest reply, and then state plainly what the evidence can and cannot establish.

The basic texts: Ishmael, Kedar, Nebaioth, and God's promise

The argument begins in Genesis. Ishmael, the son of Abraham, is not portrayed as outside God's knowledge or care. In Genesis 17:20, God says regarding Ishmael: "As for Ishmael, I have heard you; behold, I have blessed him and will make him fruitful and multiply him greatly. He shall father twelve princes, and I will make him into a great nation."

Then Genesis 25:13 lists Ishmael's sons: "These are the names of the sons of Ishmael, named in the order of their birth: Nebaioth, the firstborn of Ishmael; and Kedar..." The two names that matter for our topic - Nebaioth and Kedar - are therefore not random tribal names. They are explicitly linked to Ishmael, the son of Abraham.

Isaiah later mentions both:

"Let the desert and its cities lift up their voice, the villages that Kedar inhabits; let the inhabitants of Sela sing for joy, let them shout from the top of the mountains." - Isaiah 42:11

"All the flocks of Kedar shall be gathered to you; the rams of Nebaioth shall minister to you; they shall come up with acceptance on my altar, and I will beautify my beautiful house." - Isaiah 60:7

The Muslim argument is not merely that "Arabia is mentioned." It is more specific: Isaiah names descendants of Ishmael - Kedar and Nebaioth - in passages about a future turning of nations toward God's praise. Since Islam arose in Arabia through the Prophet Muhammad (PBUH), and since Islam restored uncompromising monotheism among the descendants of Ishmael and then carried it to many nations, Muslims see a powerful resonance between these prophecies and Islamic history.

The strongest form of the Muslim argument

Presented carefully, the argument has several layers.

  • First, Ishmael is blessed by God. Genesis 17:20 does not make Ishmael the covenant-line figure in the way Isaac is in the biblical narrative, but it does affirm a real divine blessing: fruitfulness, multiplication, twelve princes, and a great nation.
  • Second, Kedar and Nebaioth are Ishmaelites. Genesis 25:13 explicitly connects them to Ishmael. Kedar in particular is associated with desert and Arabian settings in the Bible.
  • Third, Isaiah 42 calls Kedar to join a "new song." The chapter speaks of God's servant, justice, light to the nations, and praise spreading from the ends of the earth. In that setting, the desert settlements of Kedar are summoned to rejoice.
  • Fourth, Isaiah 60 portrays Kedar and Nebaioth in accepted worship. Their flocks and rams are not rejected; they are accepted on God's altar. The imagery is of formerly distant peoples entering the sphere of worship of the one true God.
  • Fifth, Islam is the historical event that most dramatically brought Ishmaelite Arabia into Abrahamic monotheism. Before Islam, much of Arabia was marked by tribal paganism alongside Jewish, Christian, and other communities. After the mission of the Prophet Muhammad (PBUH), Arabia became the center from which worship of the one God, without idols or images, spread across continents.

From this angle, Isaiah's references are not treated as isolated proof-texts, but as part of a broader biblical pattern: Abraham's family has two major branches; Ishmael is blessed; his descendants become a great people; and Isaiah names Ishmaelite tribes in future scenes of divine praise. Islam then appears as the most natural historical fulfillment of Ishmael's descendants being gathered into God's future work.

The Qur'an itself presents the mission of the Prophet Muhammad (PBUH) as connected to the prayer of Abraham and Ishmael:

"Our Lord, and send among them a messenger from themselves who will recite to them Your verses and teach them the Book and wisdom and purify them. Indeed, You are the Exalted in Might, the Wise." (Qur'an 2:129)

A Muslim reading therefore says: the Bible preserves hints of Ishmael's future blessing, and the Qur'an identifies the fulfillment as a messenger raised among Abraham and Ishmael's descendants.

Why Isaiah 42 matters in particular

Isaiah 42 is especially important because it is not merely a travel notice. It is a religious passage. It speaks of God's servant, justice, a covenant, light to the nations, and a new song to the Lord. Then it names the desert, Kedar, and Sela.

Muslim apologists often connect this to Arabia: Kedar as an Ishmaelite-Arab tribe, and Sela as a rocky place, sometimes linked by Muslim writers to the region of Madinah because of its known mountain called Sela. Here caution is necessary. The Hebrew word and place-identification are not beyond dispute. Many biblical scholars identify Sela with a place in Edom, often associated with the region of Petra. Others treat it more generally as a rocky area. Therefore, a careful argument should not rest heavily on "Sela = Madinah" as if that were certain.

The stronger point is not the exact identification of Sela. It is that Isaiah 42 places Kedar - the Ishmaelite-Arabian world - among those summoned to proclaim praise in a future movement of God's guidance and justice. That fits the Islamic claim better than it fits any view that Ishmael's line is spiritually irrelevant.

Why Isaiah 60 matters: accepted worship from Kedar and Nebaioth

Isaiah 60:7 is also striking because it names both Kedar and Nebaioth, the same pair found among Ishmael's sons in Genesis 25:13. Their offerings are described as accepted. This is not a picture of Ishmaelites being cursed, erased, or permanently excluded. They are present in a future scene of worship.

From a Muslim perspective, this is deeply meaningful. Islam teaches that the God of Abraham is one, that worship belongs to Him alone, and that the Ka'bah in Makkah was connected to Abraham and Ishmael. The rise of Islam made the Ishmaelite-Arabian world a center of prayer, pilgrimage, scripture, and global monotheism.

At the same time, we must be precise. Isaiah 60 itself speaks of Zion, Jerusalem, and nations bringing wealth and offerings. In the immediate literary context, it is not explicitly describing the Ka'bah, Makkah, or a prophet arising in Arabia. A Muslim may see a broader providential pattern, but the verse itself does not spell out that later identification.

The strongest reply from a Jewish or Christian reader

The strongest counter-argument is contextual. A Jewish or Christian reader may say: Isaiah is not predicting Islam. Isaiah 42 and 60 are about the restoration and glorification of Israel, the spread of God's praise among the nations, and the nations honoring Zion. Kedar and Nebaioth appear as representative distant peoples, not as the source of a new revelation. In Isaiah 60:7, their animals come to God's altar in Jerusalem; the text does not say that revelation will arise among them or that they will become the central religious community.

This is a serious reply. It should not be dismissed. The plain literary setting of Isaiah 60 is Zion-centered. The text says, "they shall come up with acceptance on my altar" and "I will beautify my beautiful house." A reader committed to the biblical canon as interpreted in Jewish or Christian tradition can reasonably read this as the nations coming to acknowledge the God of Israel, not as a direct prediction of Islam.

Similarly, Isaiah 42's "new song" is a known biblical expression for renewed praise of God. It does not, by itself, prove a new scripture. And while Kedar's mention is notable, it is still one named group among others. The chapter does not explicitly say, "A prophet will arise from Kedar."

Therefore, if a Muslim claims that these verses are a direct, unambiguous, stand-alone proof of the Prophet Muhammad (PBUH), the claim is stronger than the evidence allows.

What the argument does establish

Properly stated, the argument establishes several important points.

  • It establishes that Ishmael is not outside God's future concern. Genesis 17:20 records a divine blessing upon Ishmael. This matters because some polemical readings treat Ishmael's line as spiritually discarded. The biblical text itself is more nuanced.
  • It establishes that Kedar and Nebaioth are Ishmaelite names with prophetic significance. Isaiah includes them in future scenes of praise and accepted worship.
  • It establishes that Arabia is not absent from the biblical religious horizon. Kedar represents a desert-Arabian people, and Isaiah imagines such people joining the praise of the Lord.
  • It establishes a meaningful harmony with the Islamic narrative. Islam is the great historical movement through which the Arabian descendants associated with Ishmael became bearers of strict Abrahamic monotheism to the world.

These are not small points. They make the Islamic reading plausible within a cumulative case: Abraham prays, Ishmael is blessed, Ishmaelite tribes are named in future worship, and then Islam arises from that world with a universal call to the worship of the one God.

What the argument does not establish

Honesty also requires us to say what it does not establish.

  • It does not explicitly name the Prophet Muhammad (PBUH). The names in the passages are Kedar and Nebaioth, not Muhammad.
  • It does not prove, from Isaiah alone, that a new scripture would arise in Arabia. That conclusion depends on a broader theological reading, not on the bare wording of Isaiah 42:11 or 60:7.
  • It does not require every detail of Isaiah 60 to be read as Makkah. The chapter's immediate imagery is Zion and altar worship, and that must be acknowledged.
  • It does not settle Jewish, Christian, and Muslim disagreement over covenant history. It contributes to the discussion, but it is not the whole argument.

A modest claim is stronger: these passages are not a complete proof by themselves, but they are significant signs. They show that the Bible's own prophetic imagination includes Ishmael's descendants in God's future praise and accepted worship. Islam's emergence from Arabia gives that inclusion a remarkable historical fulfillment.

Conclusion

Isaiah's mention of Kedar and Nebaioth should be handled with care. It is not a verse where a Muslim should say, "This is an explicit biblical prediction of Islam in every detail." That would be overclaiming. But neither should it be dismissed as meaningless. Genesis identifies Kedar and Nebaioth as sons of Ishmael; Genesis records God's blessing upon Ishmael; Isaiah places these Ishmaelite names in scenes of future praise and accepted worship.

For the thoughtful reader, the argument is best understood as part of a cumulative sign: the God of Abraham did not abandon Ishmael's line, and history witnessed the rise of a powerful, scripture-based, uncompromising monotheism from Arabia through the Prophet Muhammad (PBUH). Isaiah's words do not force that conclusion on every reader, but they fit it with striking depth.