‏الزهد والرقائق‏ : Hadeeth No:7131 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 try to restrain it with cue help of his hand since it is the Satan that enters therein....

‏الحج : Hadeeth No:3110 Ibn 'Abbas (Allaah be pleased with them) reported: I heard Allaah's Messenger (sallAllaahu alayhi wa sallam) delivering a sermon and making this observation:" No person should be alone with a woman except when there is a Mahram with her, and the woman should not undertake journey except with a Mahra...