Sayyiduna Jubayr bin Mut'im (may Allah be pleased with him) narrated: I came to the Messenger of Allah (peace and blessings be upon him) regarding the ransom of the people of Badr. When I spoke to him (peace and blessings be upon him), he (peace and blessings be upon him) said: "If Mut'im bin Adi were with me and then spoke to me about them, I would have released them for his sake."
And Mut'im bin Adi had done a favour for the Messenger of Allah (peace and blessings be upon him).
Hadith Referenceالمعجم الكبير للطبراني / باب الجيم / 1495