ذِكْرُ اسْتِحْبَابِ الْمُبَالَغَةِ لِلْمَرْءِ فِي بِرِّ وَالِدِهِ رَجَاءَ اللُّحُوقِ بِالْبَرَرَةِ فِيهِ
A son does not repay what he owes to his father unless he buys him and emancipates him if he finds him in slavery. (Using translation from Abū Dāʾūd 5137)
قَالَ رَسُولُ اللَّهِ ﷺ «لَا يَجْزِي وَلَدٌ وَالِدَهُ إِلَّا أَنْ يَجِدَهُ مَمْلُوكًا فَيَشْتَرِيَهُ فَيَعْتِقَهُ»