ENOfficial
Ibn ‘Umar said: When the first Emigrants came to Medina, Salim the client of Abu Hudhaifa acted as their imam, and ‘Umar and Abu Salama b. ‘Abd al-Asad were among their number. Bukhari transmitted it.
Source: sunnah.com
Other translations
Arabic
وَعَنِ ابْنِ عُمَرَ قَالَ: لَمَّا قَدِمَ الْمُهَاجِرُونَ الْأَوَّلُونَ الْمَدِينَةَ كَانَ يَؤُمُّهُمْ سَالِمٌ مَوْلَى أَبِي حُذَيْفَةَ وَفِيهِمْ عُمَرُ وَأَبُو سَلَمَةَ بْنُ عَبْدِ الْأسد. رَوَاهُ البُخَارِيّ
sunnah.com