Have you some dates? I said : Yes. I then gave him some dates which he put in his mouth, chewed them, opened his mouth and them in it. The baby began to lick them. The prophet (May peace be upon him) said: ANSAR’s favourite (fruit) is dates. And he gave him the name of ‘Abd al-Rahman. (Using translation from Abū Dāʾūd 4951)
أَتَيْتُ النَّبِيَّ ﷺ بِعَبْدِ اللهِ بْنِ أَبِي طَلْحَةَ حِينَ وُلِدَ وَهُوَ يَهْنَأُ بَعِيرًا لَهُ وَعَلَيْهِ عَبَاءَةٌ فَقَالَ مَعَكَ تَمْرٌ؟ فَنَاوَلْتُهُ تَمَرَاتٍ فَأَلْقَاهُنَّ فِي فِيهِ فَلَاكَهُنَّ ثُمَّ فَغَرَ فَاهُ ثُمَّ أَوْجَرَهُنَّ إِيَّاهُ فَجَعَلَ يَتَلَمَّظُ الصَّبِيُّ فَقَالَ رَسُولُ اللهِ ﷺ حُبُّ الْأَنْصَارِ التَّمْرَ وَسَمَّاهُ عَبْدَ اللهِ