The Book of Gifts
Ṣaḥīḥ Muslim 4185
فَأَشْهِدْ عَلَى هَذَا غَيْرِي - ثُمَّ قَالَ - أَيَسُرُّكَ أَنْ يَكُونُوا إِلَيْكَ فِي الْبِرِّ سَوَاءً
fa-ashhid ʿalā hadhā ghayrī-thumma qāla-ayasurruka an yakūnūā ilayka fī al-birri sawāʾan
Transliteration generated from the Arabic vowel marks
The full narration
Nu'man b. Bashir (Allah be pleased with them) reported:My father took me to Allah's Messenger (ﷺ) and said: Allah's Messenger, bear witness that I have given such and such gift to Nu'man from my property, whereupon he (the Holy Prophet) said: Have you conferred upon all of your sons as you have conferred upon Nu'man? He said: No. Thereupon he (the Holy Prophet) said: Call someone else besides me as a witness. And he further said: Would it, please you that they (your children) should all behave virtuously towards you? He said: Yes. He (the Holy Prophet) said: Then don't do that (i e. don't give gift to one to the exclusion of others)
Source
Ṣaḥīḥ Muslim · 4185