{ Do not say to those who offer you a greeting of peace: “You are not a Believer” } . Ibn ‘Abbas said: A certain man was with a small flock of his, and the Muslims caught up with him. The man said: “Peace upon you” [“As-salam ‘alaikum” ], but they killed him and took his small flock. So Allah sent this down regarding that, up until His word: { The fleeting gain of this worldly life } .