It is narrated from Sayyiduna Jubair bin Mut'im that the Prophet (peace and blessings be upon him) said: If Mut'im bin Adi were alive and spoke to me regarding these captives (the prisoners of Badr), I would have set them all free.
Hadith Referenceمسند احمد / مسند المدنيين رضي الله عنهم اجمعين / 16733