That his father had given him a slave. The Messenger of Allah ﷺ said: What is this slave ? He replied: This is my slave which my father has given me. He asked: Has he given all your brothers the same as he has given you? He replied: No. He then said: Return it, then.
لَهُ رَسُولُ اللَّهِ ﷺ مَا هَذَا الْغُلاَمُ قَالَ غُلاَمِي أَعْطَانِيهِ أَبِي قَالَ فَكُلَّ إِخْوَتِكَ أَعْطَى كَمَا أَعْطَاكَ قَالَ لاَ قَالَ فَارْدُدْهُ
Who is this slave (how have you come to possess it)? Thereupon he (Nu'man b. Bashir) said: My father has donated it to me, whereupon he said: Have all brothers (of yours) been given this gift as given to you? He said: No. Thereupon he (the Holy Prophet) said: Then return him.
لَهُ النَّبِيُّ ﷺ مَا هَذَا الْغُلاَمُ قَالَ أَعْطَانِيهِ أَبِي قَالَ فَكُلَّ إِخْوَتِهِ أَعْطَيْتَهُ كَمَا أَعْطَيْتَ هَذَا قَالَ لاَ قَالَ فَرُدَّهُ
That his father had given him a slave. The Messenger of Allah ﷺ said: What is this slave ? He replied: This is my slave which my father has given me. He asked: Has he given all your brothers the same as he has given you? He replied: No. He then said: Return it, then. (Using translation from Abū Dāʾūd 3543)
رَسُولُ اللَّهِ ﷺ «مَا هَذَا الْغُلَامُ؟ » قَالَ غُلَامٌ أَعْطَانِيهِ أَبِي قَالَ «فَكُلُّ إِخْوَتِكَ أَعْطَاهُ كَمَا أَعْطَاكَ؟ » قَالَ لَا قَالَ «فَارْدُدْهُ» وَقَالَ لِأَبِيهِ لَا تُشْهِدْنِي عَلَى جَوْرٍ «