Sunan an-Nasa'i, Volume 4, Book 31, Hadith 3713 (DarusSalam) ⓘ

It was narrated that 'Amir said: "I was told that Bashir bin Sa'd came to the Messenger of Allah and said: 'O Messenger of Allah, my wife 'Amrah bint Rawahah told me to give a gift to her son Nu'man, and she told me to ask you to bear witness to that.' The Prophet said: 'Do you have any other children?' He said: 'Yes.' He said: 'Have you given them something like that which you have given to this one?' He said: 'No.' He said: 'Then do not ask me to bear witness to unfairness.'"

أَخْبَرَنَا أَحْمَدُ بْنُ سُلَيْمَانَ، قَالَ حَدَّثَنَا مُحَمَّدُ بْنُ عُبَيْدٍ، قَالَ حَدَّثَنَا إِسْمَاعِيلُ، عَنْ عَامِرٍ، قَالَ أُخْبِرْتُ أَنَّ بَشِيرَ بْنَ سَعْدٍ أَتَى رَسُولَ اللَّهِ صلى الله عليه وسلم فَقَالَ يَا رَسُولَ اللَّهِ إِنَّ امْرَأَتِي عَمْرَةَ بِنْتَ رَوَاحَةَ أَمَرَتْنِي أَنْ أَتَصَدَّقَ عَلَى ابْنِهَا نُعْمَانَ بِصَدَقَةٍ وَأَمَرَتْنِي أَنْ أُشْهِدَكَ عَلَى ذَلِكَ ‏.‏ فَقَالَ لَهُ النَّبِيُّ صلى الله عليه وسلم ‏"‏ هَلْ لَكَ بَنُونَ سِوَاهُ ‏"‏ ‏.‏ قَالَ نَعَمْ ‏.‏ قَالَ ‏"‏ فَأَعْطَيْتَهُمْ مِثْلَ مَا أَعْطَيْتَ لِهَذَا ‏"‏ ‏.‏ قَالَ لاَ ‏.‏ قَالَ ‏"‏ فَلاَ تُشْهِدْنِي عَلَى جَوْرٍ ‏"‏ ‏.‏