Mishkat al-Masabih 30 Fine Qualities كتاب المناقب 276

وَعَنْ زَيْدِ بْنِ أَرْقَمَ قَالَ: قَالَتِ الْأَنْصَارُ: يَا نَبِيَّ اللَّهِ لِكُلِّ نَبِيٍّ أَتْبَاعٌ وَإِنَّا قَدِ اتَّبَعْنَاكَ فَادْعُ اللَّهَ أَنْ يَجْعَلَ أَتْبَاعَنَا منا فَدَعَا بِهِ ” رَوَاهُ البُخَارِيّ

Zaid b. Arqam told that when the Ansar said, “Prophet of God, every prophet has followers and we have followed you, so beseech God to appoint that our followers should be of our stock,” he did so. Bukhari transmitted it.