Sunan an-Nasa'i 3684
سنن النسائي#3684SahihIt was narrated from 'Abdullah bin 'Utbah bin Mas'ud that a man came to the Prophet and said:"I have given a gift to my son, so bear witness." He said: "Do you have any other children?" He said: "Yes." He said: "Have you given them something like that which you have given him?" He said: "No." He said: "Shall I bear witness to unfairness?
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih Lighairihi
Al-AlbaniSahih
Zubair Ali ZaiSahih
In-book reference: 31:13