‏البر والصلة والآداب‏ : Hadeeth No:6350 Jundub reported that Allaah's Messenger (sallAllaahu alayhi wa sallam) stated that a person said: Allaah would not forgive such and such (person). Thereupon Allaah the Exalted and Glorious, said: Who is he who adjures about Me that I would not grant pardon to so and so; I have granted pardon to so a...

‏الجهاد والسير‏ : Hadeeth No:4298 It has also been narrated by Sa'd b. Abu Burda through his father through his grandfather that the Prophet of Allaah (sallAllaahu alayhi wa sallam) sent him and Mu'adh (on a mission) to the Yemen, and said (by way of advising them): Show leniency (to the people) ; don't be hard upon them; give them ...