‏الزهد والرقائق‏ : Hadeeth No:7132 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 while engaged in prayer, he should try to restrain so far as it lies in his power, since it is the Satan that enter therein....

‏الإمارة : Hadeeth No:4476 It has been narrated on the authority of 'Abdullah that the Messenger of Allaah (sallAllaahu alayhi wa sallam) said: The Caliphate will remain among the Quraish even if only two persons are left (on the earth),...