Nu'man b. Bashir, reported that Messenger of Allah 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 ﷺ قَالَ " أَلَكَ بَنُونَ سِوَاهُ " . قَالَ نَعَمْ . قَالَ " فَكُلَّهُمْ أَعْطَيْتَ مِثْلَ هَذَا " . قَالَ لاَ . قَالَ " فَلاَ أَشْهَدُ عَلَى جَوْرٍ " .