(7) باب فَضْلِ عِتْقِ الْوَالِدِ
Abu Huraira (Allah be pleased with him) reported Allah's Messenger (ﷺ) as saying:
A son does not repay what he owes his father unless he buys him (the father) in case he is a slave and then emancipates him. In the narration transmitted by Ibn Abu Shaiba there is a slight change of words.
Reference: Sahih Muslim 1510 a
In-book reference: Book 20, Hadith 29
USC-MSA web (English) reference(deprecated numbering scheme): Book 9, Hadith 3606