‏الطهارة : Hadeeth No:539 Shuraib b. Hani reported: I asked 'A'isha about wiping over the shoes. She said: You better go to 'Ali, for he knows more about this than I. I, therefore, came to 'Ali and he narrated from the Prophet (sallAllaahu alayhi wa sallam) like this....

‏الزهد والرقائق‏ : Hadeeth No:7129 Abu Huraira reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: The yawning as from the devil. So when one of you yawns he should try to restrain it as far as it lies in his power....