‏الصلاة : Hadeeth No:2116 Jabir said: Allaah's Messenger (sallAllaahu alayhi wa sallam) forbade that the graves should be plastered or they be used as sitting places (for the people), or a building should be built over them....

‏الطهارة : Hadeeth No:462 Abu Huraira reported: The Prophet of Allaah (sallAllaahu alayhi wa sallam) said. When any one of you awakes up from sleep and performs ablution, he must clean his nose three times, for the devil spends the night in the interior of his nose....