From Anas -radiyallaahu `anhu- who said
The Prophet (Sal-Allaahu 'alayhe wa sallam) said
<<Which of the creation are most amazing in Eemaan >>
They said: "The Angels
He said: <<The Angels - how could they not have Eemaan
They said: "The Prophets
He said: <<The Prophets have Revelation sent to them: how could they not have Eemaan
They said: "The Companions
He said: <<The Companions are along with the Prophets, so how could they not have Eemaan?! Rather the people most amazing in Eemaan are a people who will come after you, and who will find a book of the Revelation. So they will have Eemaan in it and follow it, so they are the most amazing of the people - (or: the creation) - in Eemaan
Reported by al-Bazzaar (3/318-319: Kashful-Astaar), and its chain of narration was declared 'hasan' by Shaykh al-Albaanee in 'as-Saheehah' (no.3215
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[Translated by Aboo Talhah Daawood ibn Ronald Burbank -Rahima-hullaah]