Musnad Abu Ya'la al-Mawsili 246:26

Narrated to us Ishaq, narrated to us Sufyan, from al-Zuhri, from Muhammad ibn Jubayr ibn Mut'im, from his father: That the Prophet (peace be upon him) said: "If al-Mut'im were alive, and he had a favor owed to him by me, and he spoke to me regarding these stinking ones [the captives of Badr], I would have released them for him."