Musannaf Ibn Abi Shayba 19:503

Abu Bakr narrated to us, he said: Shareek narrated to us, from Jabir, from a freed slave of Abu Mas’ud, from Abu Mas’ud, who said: A man who had stolen was brought. He said, "Did you steal?" He said, "I found it." He said, "You found it?" Then he let him go.