Abu Huraira reported God's messenger as saying, "Peoples will enter paradise with hearts like the hearts of birds[*]."
*Mirqat, 5, 291, gives three possible meanings:
(1) with no jealousy, rancour, deceit, or hatred; (2) in trepidation, being on their guard; (3) with complete trust, as birds trust God for their food.
Muslim transmitted it.