It was narrated from Ibn 'Abbas:
that the Messenger of was offered the daughter of Hamzah bin 'Abdul-Muttalib in marriage, and he said: "She is the daughter of my brother through breastfeeding, and breastfeeding makes unlawful (for marriage) the same things that blood ties make unlawful."
English reference: Vol. 3, Book 9, Hadith 1938
Arabic reference: Book 9, Hadith 2013