Shu'bah (may Allah have mercy on him) said: We were with Abu Burdah (may Allah have mercy on him), and his sons were also present. He said: Shall I not narrate to you a hadith that my father narrated to me? They said: Of course, O our father! He said that my father heard the Messenger of Allah (peace and blessings be upon him) say: "Whoever frees a slave (raqabah) or a bondsman, in return all of his limbs will be freed from Hell."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب العتق / 21312