Musnad Abu Ya'la al-Mawsili 42:114

Zakariya ibn Yahya narrated to us, Dawud ibn al-Zibriqan narrated to us, Muhammad ibn Jahadah narrated to us, from Abu Salih, from Abu Sa’id, that the Messenger of Allah (may Allah bless him and grant him peace) said: "Do not revile my companions, for if one of you were to spend the equivalent of Mount Uhud in gold, you would not attain a mudd of one of them, nor even half of it."