Volume 4, Book 53, Number 345:
Narrated Jabir bin ‘Abdullah Al-Ansari:
Volume 4 – 719 / 1700
SAHIH BUKHARI VOLUME 4 > BOOK 53: ONE-FIFTH OF BOOTY TO THE CAUSE OF ALLAH (KHUMUS)
A man amongst us begot a boy whom he named Al-Qasim. On that the Ansar said, (to the man),
“We will never call you Abu-al-Qasim and will never please you with this blessed title.” So, he went
to the Prophet and said, “O Allah’s Apostle! I have begotten a boy whom I named Al-Qasim and the
Ansar said, ‘We will never call you Abu-al-Qasim, nor will we please you with this title.’ ” The
Prophet said, “The Ansar have done well. Name by my name, but do not name by my Kunya, for I am
Qasim.”