when the first emigrants came (to Madina), they stayed at al-‘Asbah (a place near Madina) before the advent of the Messenger of Allah ﷺ. Salim, the client of Abu Hudhaifah, acted as their imam, as he knew the Qur’an better than all of them, al-Haitham(the narrator) added: and ‘Umar b. al-Khattab and Abu Salamah b. ‘Abd al-Asad were among them. (Using translation from Abū Dāʾūd 588)
لَمَّا قَدِمَ الْمُهَاجِرُونَ الْأَوَّلُونَ نَزَلُوا الْعَصْبَةَ قَبْلَ مَقْدَمِ رَسُولِ اللهِ ﷺ وَكَانَ يَؤُمُّهُمْ سَالِمٌ مَوْلَى أَبِي حُذَيْفَةَ وَكَانَ أَكْثَرَهُمْ قُرْآنًا زَادَ الْهَيْثَمُ وَفِيهِمْ عُمَرُ بْنُ الْخَطَّابِ وَأَبُو سَلَمَةَ بْنُ عَبْدِ الْأَسَدِ