Narrated Abu Huraira:

While we were sitting with the Prophet Surat Al-Jumu'a was revealed to him, and when the Verse, "And He (Allah) has sent him (Muhammad) also to other (Muslims).....' (62.3) was recited by the Prophet, I said, "Who are they, O Allah's Apostle?" The Prophet did not reply till I repeated my question thrice. At that time, Salman Al-Farisi was with us. So Allah's Apostle put his hand on Salman, saying, "If Faith were at (the place of) Ath-Thuraiya (pleiades, the highest star), even then (some men or man from these people (i.e. Salman's folk) would attain it."

حَدَّثَنِي عَبْدُ الْعَزِيزِ بْنُ عَبْدِ اللَّهِ، قَالَ حَدَّثَنِي سُلَيْمَانُ بْنُ بِلاَلٍ، عَنْ ثَوْرٍ، عَنْ أَبِي الْغَيْثِ، عَنْ أَبِي هُرَيْرَةَ، رضى الله عنه قَالَ كُنَّا جُلُوسًا عِنْدَ النَّبِيِّ ﷺ فَأُنْزِلَتْ عَلَيْهِ سُورَةُ الْجُمُعَةِ وَآخَرِينَ مِنْهُمْ لَمَّا يَلْحَقُوا بِهِمْ قَالَ قُلْتُ مَنْ هُمْ يَا رَسُولَ اللَّهِ فَلَمْ يُرَاجِعْهُ حَتَّى سَأَلَ ثَلاَثًا، وَفِينَا سَلْمَانُ الْفَارِسِيُّ، وَضَعَ رَسُولُ اللَّهِ ﷺ يَدَهُ عَلَى سَلْمَانَ ثُمَّ قَالَ " لَوْ كَانَ الإِيمَانُ عِنْدَ الثُّرَيَّا لَنَالَهُ رِجَالٌ ـ أَوْ رَجُلٌ ـ مِنْ هَؤُلاَءِ ".