Sunan Ibn Majah

It was narrated from Hudhaifah that the Messenger of Allah (ﷺ) said:“Count for me all those who have uttered (the word of) Islam.” We said: “O Messenger of Allah, do you fear for us when we number between six and seven hundred?” The Messenger of Allah (ﷺ) said: “You do not know, perhaps you will be tested.”