The report is real, but the racial conclusion often drawn from it is much stronger than the text allows. It proves that two slaves described as black were used in a purchase; it does not prove that the Prophet (PBUH) valued Black people less because they were Black.
How the argument is usually made
The strongest version of the objection is this: a slave pledged allegiance to the Prophet (PBUH), then his owner came to reclaim him. The Prophet (PBUH) bought that slave by giving the owner two Black slaves. The critic says: if two Black slaves were exchanged for one slave, the report seems to show that Black slaves were worth less, and that the Prophet (PBUH) participated in a race-based valuation.
A slave came and pledged allegiance to the Prophet for migration, and he did not realize that he was a slave. Then his master came looking for him. The Prophet said: "Sell him to me." So he bought him for two black slaves. After that, he would not accept anyone's pledge until he asked whether he was a slave.
Sahih Muslim
That is a fair question. The wording mentions color, and the two-for-one detail naturally catches the eye.
What the report actually establishes
The hadith establishes a few limited facts. First, the Prophet (PBUH) did not knowingly accept a slave's pledge of migration as if he were legally free. Second, when the owner came, the Prophet (PBUH) did not simply ignore the owner's legal claim under the system that existed then; he resolved it by purchase. Third, the price in that transaction was two slaves described as black.
But the report does not say the slave being purchased was white, Arab, or racially superior. His color is not given. It also does not say, "because they were black," nor does it state a legal rule that Black slaves are worth half of others. In markets, the value of enslaved persons - like other property under that historical system - varied by age, health, strength, skills, language, training, and the urgency or willingness of the buyer and seller. A two-for-one exchange by itself cannot identify the reason for the price.
The word "black" here can function as a description, not a moral judgment. Hadith narrators often mention visible descriptions to identify people or objects. Turning every description into the cause of the ruling is a mistake unless the text itself indicates causation.
The wider teaching of Islam on race
The clearest Islamic texts do not allow racial superiority. Human difference in color is described as a sign of God, not a scale of worth.
And among His signs is the creation of the heavens and the earth and the diversity of your languages and your colors. Surely in that are signs for those who know.
Quran 30:22
O mankind, We created you from a male and a female and made you peoples and tribes so that you may know one another. Surely the most noble of you before Allah is the most righteous of you.
Quran 49:13
The Prophet (PBUH) applied this directly. When Abu Dharr insulted Bilal by referring to his mother, the Prophet (PBUH) rebuked him sharply:
"You are a man in whom there is still ignorance."
Sahih al-Bukhari and Sahih Muslim
And he taught:
"Allah does not look at your forms or your wealth, but He looks at your hearts and your deeds."
Sahih Muslim
So if someone claims this hadith creates a racial hierarchy, that reading collides with explicit Quranic principles and the Prophet's own correction of racial contempt.
What should be said plainly
Plainly: the report is not proof of prophetic racism. It is proof that slavery existed in that society and that the Prophet (PBUH) dealt with an existing legal claim through a purchase involving two slaves described as black. It may reflect the painful realities of slavery-era markets, but it does not establish that the Prophet (PBUH) assigned lower human worth to Black people.
A Muslim should not soften the ugliness of slavery as a human institution. At the same time, we should not force a conclusion onto a text that the text itself does not carry. The moral center of the Quran and Sunnah is that honor belongs to righteousness, not color.