Musnad Ahmad 1153:1397

Muhammad ibn Ja‘far narrated to us, he said: Shu‘bah narrated to us, from Humayd ibn Nafi‘, from Zaynab bint Umm Salamah. Umm Salamah said to ‘Aishah: "The adolescent boy who has reached puberty enters upon you, and I do not like for him to enter upon me." ‘Aishah said: "Is there not for you in the Messenger of Allah (peace and blessings of Allah be upon him) a good example?" She said: "The wife of Abu Hudhayfah said: 'O Messenger of Allah, Salim enters upon me while he is a man, and there is something in the soul of Abu Hudhayfah regarding him.' The Messenger of Allah (peace and blessings of Allah be upon him) said: 'Breastfeed him so that he may enter upon you.'"