صحيح مسلم 3583

Ibn Abbas (Allah be pleased with them) reported:It was proposed that he (the Holy Prophet) be married to the daughter of Hamza, whereupon he said: She is not lawful for me for she is the daughter of my foster-brother, and that is unlawful by reason of fosterage what is unlawful by reason of genealogy

Rapporté par Ibn Abbas رضي الله عنهما : On a proposé au Prophète ﷺ d’épouser la fille de Hamza, mais il a dit : « Elle ne m’est pas permise, car elle est la fille de mon frère de lait. Ce qui est interdit à cause de l’allaitement est interdit comme par la parenté. »