‏الزهد والرقائق‏ : Hadeeth No:7130 The son of Abu Said al-Khudri reported on the authority of his father that Allaah's Messenger (sallAllaahu alayhi wa sallam) said: When one of you yawns, he should keep his mouth shut with the help of his hand, for it is the devil that enters therein....

‏الإمارة : Hadeeth No:4636 It has been narrated on the authority of Abu Huraira who said: The Messenger of Allaah (sallAllaahu alayhi wa sallam) was asked: What deed could be an equivalent of Jihad in the way of Allaah, the Almighty and Exalted? He answered: You do not have the strength to do that deed. The narrator said: The...