Sahih al-Bukhari 6186
Narrated Jabir:
A boy was born for a man among us, and the man named him Al-Qasim. We said to him, "We will not 
call you Abu-l-Qasim, nor will we respect you for that." The Prophet (ﷺ) was informed about that, and he 
said, "Name your son `Abdur-Rahman."
حَدَّثَنَا صَدَقَةُ بْنُ الْفَضْلِ، أَخْبَرَنَا ابْنُ عُيَيْنَةَ، حَدَّثَنَا ابْنُ الْمُنْكَدِرِ، عَنْ جَابِرٍ ـ رضى الله عنه ـ قَالَ وُلِدَ لِرَجُلٍ مِنَّا غُلاَمٌ فَسَمَّاهُ الْقَاسِمَ فَقُلْنَا لاَ نَكْنِيكَ أَبَا الْقَاسِمِ وَلاَ كَرَامَةَ‏.‏ فَأَخْبَرَ النَّبِيَّ صلى الله عليه وسلم فَقَالَ ‏
"‏ سَمِّ ابْنَكَ عَبْدَ الرَّحْمَنِ ‏"‏‏.‏