Musannaf Ibn Abi Shayba 32:14

Mu'tamir ibn Sulayman narrated to us, from his father, who said: Abu 'Uthman narrated to us, from Abu Burdah, who said: When death approached Abu Musa, he said: "O my sons, remember the owner of the loaf." He said: There was a man who used to worship in a hermitage—I think he said for seventy years—and he would not descend except on one day. He said: So he descended on one day. He said: Then Satan made a woman appear to him, or he made him see a woman, and he was with her for seven days or seven nights. He said: Then the veil was lifted from the man, and he went out repentant. Every time he took a step, he would pray and prostrate. He said: Nightfall brought him to a place where there were twelve poor people. Exhaustion overtook him, so he threw himself down between two of them. There was a monk there who would send them loaves every night, giving each person a loaf. The owner of the loaves came and gave each person a loaf, and he passed by the one who had gone out repentant, thinking he was a poor person, so he gave him a loaf. The one who was left out said to the owner of the loaves: "What is the matter with you that you did not give me my loaf? You were not in need of it." He said: "Do you see me withholding it from you? Ask them if I gave any of you two loaves." They said: "No." He said: "I am not withholding it from you, and by Allah, I will not give you anything tonight." He said: The repentant man took the loaf that had been given to him and gave it to the man who had been left out. The repentant man then died in the morning. He said: The seventy years were weighed against the seven nights, and they did not outweigh them. He said: Then the loaf was weighed against the seven nights, and the loaf outweighed them. Abu Musa said: "O my sons, remember the owner of the loaf."