Musnad Ahmad 1179:0

Narrated to us by Yahya ibn Sa'id, from Ibn 'Ajlan, who said: Zayd ibn Aslam narrated to me, from his father, from Umm Mubashshir, the wife of Zayd ibn Harithah, that she said: The Messenger of Allah (ﷺ) entered upon me while I was in a garden belonging to the Banu al-Najjar. He said: "No Muslim who plants a tree, and a human or an animal eats from it, except that it is recorded for him as a charity."