Musnad Ahmad 1153:161

Yahya narrated to us, Malik narrated to us, Abdullah ibn Dinar narrated to us, from Sulayman ibn Yasar, from Urwah, from Aisha, from the Prophet, peace and blessings of Allah be upon him: "That which is forbidden by nursing is that which is forbidden by birth." He said: And Abdullah ibn Abi Bakr narrated to me, from Amrah, from Aisha, from the Prophet, peace and blessings of Allah be upon him, the like of it.