‏النكاح : Hadeeth No:3237 Sa'd b. Abi Waqqas (Allaah be pleased with him) reported: The Messengger of Allaah (sallAllaahu alayhi wa sallam) rejected (the idea) of Uthman b. Muz'unliving in celibacy (saying): And if he (the Prophet) had given me permission We would have got ourselves castrated....

‏فضائل الصحابة‏ : Hadeeth No:6116 Abu Huraira reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: To the tribe of Aslam Allaah has granted safety and to the tribe of Ghifar Allaah has granted pardon. Verily it is not I that say this, but (it is) Allaah the Exalted and Glorious. (who) says this....