Sahih Muslim Book 1, Hadith Number 60.

Chapter : Concerning the branches of Iman.

It is narrated on the authority of Qatada. We were sitting with ‘Imran b. Husain in a company and Bushair Ibn Ka’b was also amongst us. ‘Imran narrated to us that on a certain occasion the Messenger of Allah (may peace and blessings be upon him) said: Modesty is a virtue through and through, or said: Modesty is a goodness complete. Upon this Bushair Ibn Ka’b said: Verily we find in certain books or books of (wisdom) that it is God-inspired peace of mind or sobriety for the sake of Allah and there is also a weakness in it. Imran was so much enraged that his eyes became red and he said: I am narrating to you the hadith of the Messenger of Allah (may peace be upon him) and you are contradicting it. He (the narrator) said: Imran reported the hadith, He (the narrator) said: Bushair repeated,(the same thing). Imran was enraged. He (the narrator) said: We asserted: Verily Bushair is one amongst us. Abu Nujaid ! There is nothing wrong, with him (Bushair).