عَنْ جَابِرِ بْنِ عَبْدِ اللَّهِ رَضِيَ اللَّهُ عَنْهُمَا قَالَ وُلِدَ لِرَجُلٍ مِنَّا غُلَامٌ فَأَسْمَاهُ الْقَاسِمَ فَقُلْنَا لَا نُكَنِّيكَ أَبَا الْقَاسِمِ وَلَا نُنْعِمُكَ عَيْنًا فَأَتَى النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ فَذَكَرَ ذَلِكَ لَهُ فَقَالَ أَسْمِ ابْنَكَ عَبْدَ الرَّحْمَنِ
It is narrated from Sayyiduna Jabir bin Abdullah (may Allah be pleased with him), he says: A child was born to one of us, he named him Qasim. We said to him: We will not give you the kunyah (patronymic) Abu al-Qasim, nor will we thus cool your eyes. So he went to the Noble Prophet (peace and blessings be upon him) and informed him of this matter. The Prophet (peace and blessings be upon him) said: Name your son Abdur Rahman.