Sunan Abi Dawud, Book 41, Hadith 5117 (USC-MSA) ⓘ
Abu Hurairah reported the Messenger of Allah (May peace be upon him) as saying: A son does not repay what he owes to his father unless he buys him and emancipates him if he finds him in slavery.
حَدَّثَنَا مُحَمَّدُ بْنُ كَثِيرٍ، أَخْبَرَنَا سُفْيَانُ، قَالَ حَدَّثَنِي سُهَيْلُ بْنُ أَبِي صَالِحٍ، عَنْ أَبِيهِ، عَنْ أَبِي هُرَيْرَةَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " لاَ يَجْزِي وَلَدٌ وَالِدَهُ إِلاَّ أَنْ يَجِدَهُ مَمْلُوكًا فَيَشْتَرِيَهُ فَيُعْتِقَهُ " .
also referenced under: Hadith 5137 (DarusSalam) & Hadith 5118 (Hasan)