Sahih Muslim 1623 i
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).
حَدَّثَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، حَدَّثَنَا عَبْدُ الْوَهَّابِ، وَعَبْدُ الأَعْلَى، ح وَحَدَّثَنَا إِسْحَاقُ، بْنُ إِبْرَاهِيمَ وَيَعْقُوبُ الدَّوْرَقِيُّ جَمِيعًا عَنِ ابْنِ عُلَيَّةَ، - وَاللَّفْظُ لِيَعْقُوبَ - قَالَ حَدَّثَنَا إِسْمَاعِيلُ، بْنُ إِبْرَاهِيمَ عَنْ دَاوُدَ بْنِ أَبِي هِنْدٍ، عَنِ الشَّعْبِيِّ، عَنِ النُّعْمَانِ بْنِ بَشِيرٍ، قَالَ انْطَلَقَ بِي أَبِي يَحْمِلُنِي إِلَى رَسُولِ اللَّهِ صلى الله عليه وسلم فَقَالَ يَا رَسُولَ اللَّهِ اشْهَدْ أَنِّي قَدْ نَحَلْتُ النُّعْمَانَ كَذَا وَكَذَا مِنْ مَالِي ‏.‏ فَقَالَ ‏"‏ أَكُلَّ بَنِيكَ قَدْ نَحَلْتَ مِثْلَ مَا نَحَلْتَ النُّعْمَانَ ‏"‏ ‏.‏ قَالَ لاَ ‏.‏ قَالَ ‏"‏ فَأَشْهِدْ عَلَى هَذَا غَيْرِي - ثُمَّ قَالَ - أَيَسُرُّكَ أَنْ يَكُونُوا إِلَيْكَ فِي الْبِرِّ سَوَاءً ‏"‏ ‏.‏ قَالَ بَلَى ‏.‏ قَالَ ‏"‏ فَلاَ إِذًا ‏"‏ ‏.‏