A man among us begot a boy whom he named Al-Qasim. The people said, "We will not call him (i.e., the father) by that Kuniya (Abu-l-Qasim) till we ask the Prophet ﷺ about it. The Prophet ﷺ said. "Name yourselves by my name, but do not call (yourselves) by my Kuniya."
وُلِدَ لِرَجُلٍ مِنَّا غُلاَمٌ فَسَمَّاهُ الْقَاسِمَ فَقَالُوا لاَ نَكْنِيهِ حَتَّى نَسْأَلَ النَّبِيَّ ﷺ فَقَالَ سَمُّوا بِاسْمِي وَلاَ تَكْتَنُوا بِكُنْيَتِي