Sayyiduna Uqbah bin al-Harith (may Allah be pleased with him) said: I came to the Messenger of Allah (peace and blessings be upon him) and said: I married the daughter of Abu Ihab, then a black woman came who claimed that she had breastfed both of us. He (peace and blessings be upon him) turned away from me. I came to him from the other side, and again he turned away. Then I came in front of him and said: O Messenger of Allah! She is only a black woman (I began to belittle her word), and he (peace and blessings be upon him) said: "How can it be, when it has already been said?"
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 15047