Sunan Ibn Majah, Chapter: The Chapters on Ascetism (Zuhd)

"This Verse was revealed concerning us six: Myself, Ibn Masud, Suhaib, Ammar, Miqdad and Bilal. The Quraish said to the Messenger of Allah (saw): We do not want to join them, send them away. Thoughts of that entered the heart of the Messenger of Allah (saw) as much as Allah willed, then Allah revealed: "And turn not away those who invoke their Lord, morning and afternoon seeking His Face. You are accountable for them in nothing, and they are accountable for you in nothing, that you may turn them away, and thus become of the unjust." [6:52]