Aminah and her slave girl Qutbah saw Madluk Abu Sufyan (may Allah be pleased with him) and heard him say: I came to the Prophet (peace and blessings be upon him) with my masters and accepted Islam. Aminah said: "I saw that the part of his head over which the Prophet (peace and blessings be upon him) had passed his hand remained black, while all the rest of his head had turned white."
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 17935