Sayyidah Aishah (may Allah be pleased with her) said: The Messenger of Allah (peace and blessings be upon him) married Sayyidah Sawdah bint Zam'ah (may Allah be pleased with her). Her brother, Abd bin Zam'ah, returned from Hajj and began (in anger) throwing dust on his head. Then, when he became Muslim, he said: "How foolish I was on the day I threw dust on my head because the Messenger of Allah (peace and blessings be upon him) had married Sawdah."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 14042