Musnad Ahmad 430:5

Yahya ibn Sa'id and Bahz narrated to us, they said: Sulayman ibn al-Mughirah narrated to us, he said: Humayd ibn Hilal narrated to us, he said: 'Abdullah ibn Mughaffal narrated to us, he said: A leather bag of fat was lowered on the day of Khaybar. He said: So I embraced it. I said: "I will not give anyone anything from it." He said: Then I turned around, and behold, the Messenger of Allah (peace and blessings of Allah be upon him) was smiling. Bahz said: At me.