Jami' at-Tirmidhi — Hadith #27304

Ahmad bin Mani` told us, Ismail bin Ibrahim told us, Ali bin Zaid told us, on the authority of Sa`id bin al-Musayyab, on the authority of Ali bin Abi Talib, He said: The Messenger of God, may God bless him and grant him peace, said, “Indeed, God has forbidden through breastfeeding what He has forbidden through lineage.” He said, and in the chapter on the authority of Aisha And Ibn Abbas and Umm Habibah. Abu Issa said: The hadith of Ali is hasan and authentic.