"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.'"  

أَنَّ بَشِيرَ بْنَ سَعْدٍ أَتَى رَسُولَ اللَّهِ ﷺ فَقَالَ يَا رَسُولَ اللَّهِ إِنَّ امْرَأَتِي عَمْرَةَ بِنْتَ رَوَاحَةَ أَمَرَتْنِي أَنْ أَتَصَدَّقَ عَلَى ابْنِهَا نُعْمَانَ بِصَدَقَةٍ وَأَمَرَتْنِي أَنْ أُشْهِدَكَ عَلَى ذَلِكَ فَقَالَ لَهُ النَّبِيُّ ﷺ هَلْ لَكَ بَنُونَ سِوَاهُ قَالَ نَعَمْ قَالَ فَأَعْطَيْتَهُمْ مِثْلَ مَا أَعْطَيْتَ لِهَذَا قَالَ لاَ قَالَ فَلاَ تُشْهِدْنِي عَلَى جَوْرٍ  

"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.'" (Using translation from Nasāʾī 3683)   

أَتَى رَسُولُ اللَّهِ ﷺ بَشِيرَ بْنَ سَعْدٍ فَقَالَ يَا رَسُولَ اللَّهِ إِنَّ عَمْرَةَ بِنْتَ رَوَاحَةَ أَرَادَتْنِي أَنْ أَتَصَدَّقَ عَلَى ابْنِهَا بِصَدَقَةٍ وَأَمَرَتْنِي أَنْ أُشْهِدَكَ عَلَيْهَا فَقَالَ لَهُ رَسُولُ اللَّهِ ﷺ «هَلْ لَكَ بَنُونَ سِوَاهُ؟ » قَالَ نَعَمْ قَالَ «فَكُلُّهُمْ أَعْطَيْتَهُمْ مِثْلَ مَا أَعْطَيْتَ هَذَا؟ » قَالَ لَا قَالَ «فَلَا تُشْهِدْنِي عَلَى جَوْرٍ»