´It was narrated from 'Aishah:` that the Messenger of Allah said: 'Breast-feeding makes unlawful (for marriages) the same things that blood tie make unlawful.”
Hadith ReferenceSunan Ibn Majah / The Chapters on Marriage / Hadith: 1937
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:صحيح مسلم