كتاب الهبات
24
The Book of Gifts
(3)
Chapter: It Is Disliked To Favor Some Of One's Children Over Others In Gift-Giving
(3)
باب كَرَاهَةِ تَفْضِيلِ بَعْضِ الأَوْلاَدِ فِي الْهِبَةِ ‏‏

Nu'man b. Bashir, reported that Allah's Messenger (ﷺ) had said:

Have you, besides him, other sons? He said: Yes. Thereupon he (the Holy Prophet) said: Have you given gifts to all of them like this (as you have given to Nu'man)? He said: No. Thereupon he (the Holy Prophet) said: I cannot bear witness to an injustice.
حَدَّثَنَا ابْنُ نُمَيْرٍ، حَدَّثَنِي أَبِي، حَدَّثَنَا إِسْمَاعِيلُ، عَنِ الشَّعْبِيِّ، عَنِ النُّعْمَانِ بْنِ بَشِيرٍ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏"‏ أَلَكَ بَنُونَ سِوَاهُ ‏"‏ ‏.‏ قَالَ نَعَمْ ‏.‏ قَالَ ‏"‏ فَكُلَّهُمْ أَعْطَيْتَ مِثْلَ هَذَا ‏"‏ ‏.‏ قَالَ لاَ ‏.‏ قَالَ ‏"‏ فَلاَ أَشْهَدُ عَلَى جَوْرٍ ‏"‏ ‏.‏
Reference : Sahih Muslim 1623 g
In-book reference : Book 24, Hadith 21
USC-MSA web (English) reference : Book 12, Hadith 3967
  (deprecated numbering scheme)