Jabir bin 'Abdullah reported: A child was born in the house of a person amongst us, and he gave him the name of Qasim. We said: We will not allow you (to give the name) to your child as Qasim (and thus adopt the kunya of Abu'l-Qasim) and cool your eyes. He (that person) came to Allah's Apostle ( صلی اللہ علیہ وسلم ) and made a mention of that to him, whereupon he said: Call your son 'Abdul Rahman.