Jami` at-Tirmidhi 1906
جامع الترمذي#1906SahihAbu Hurairah narrated that:the Messenger of Allah said: "A son could not do enough for his father, unless he found him as a slave and purchased him to set him free
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirSahih
Al-AlbaniSahih
Bashar Awad MaaroufHasan Sahih
Zubair Ali ZaiSahih Muslim
In-book reference: 27:12