‏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....

‏الصلاة : Hadeeth No:1682 'Abdullah b. 'Abbas reported: He spent (one night) in the house of the Messenger of Allaah (sallAllaahu alayhi wa sallam). He (the Prophet) got up, brushed his teeth and performed ablution and said:" In the creation of the heavens and the earth, and the alternation of the night and the day, there ar...