Jami` at-Tirmidhi 1903
جامع الترمذي#1903Da'ifIbn 'Umar narrated that :the Prophet said: "Among the most dutiful of deeds is that a man nurture relations with the people his father was friends with
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirSahih
Al-AlbaniDaif
Bashar Awad MaaroufSahih
Zubair Ali ZaiSahih Muslim
In-book reference: 27:7