"My father took me to the Prophet to ask him to bear witness to something that he had given to me. He said: 'Do you have any other children?' He said: 'Yes.' He gestured with his hand held horizontally like this, (saying): 'Why don't you treat them all equally?'" (Using translation from Nasāʾī 3685)
سَمِعْتُ النُّعْمَانَ بْنَ بَشِيرٍ يَقُولُ ذَهَبَ بِي أَبِي إِلَى النَّبِيِّ ﷺ يُشْهِدُهُ عَلَى شَيْءٍ أَعْطَانِيهِ فَقَالَ «أَلَكَ وَلَدٌ غَيْرُهُ؟» قَالَ نَعَمْ وَصَفَّ بِيَدِهِ بِكَفِّهِ أَجْمَعَ كَذَا «أَلَا سَوَّيْتَ بَيْنَهُمْ»