Abu Huraira said:
When we were sitting with the Prophet sura al-Jum u'a[1] came down. Then when the words "and others of them who have not yet joined them"[2] came down, the people asked God's messenger who they were. Salman al-Farisi was among us, and placing his hand on Salman the Prophet said, "If faith were in the Pleiades some of these men would attain it."
1. Quran; 62
2. Verse 3
(Bukhari and Muslim.)