Sunan Ibn Majah 1943

It was narrated that 'Aishah said:“Sahlah bint Suhail came to the Prophet and said: 'O Messenger of Allah, I see signs of displeasure on the face of Abu Hudhaifah when Salim enters upon me.” The Prophet said: “Breastfeed him.” She said: “How can I breastfeed him when he is a grown man? The Messenger of Allah smiled and said: “I know that he is a grown man.” So she did that, then she came to the Prophet and said: “I have never seen any signs of displeasure on the face of Abu Hudhayfah after that.” And he was present at (the battle of) Badr