‏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....

‏الصيام : Hadeeth No:2363 Ibn Umar (Allaah be pleased with both of them) reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying in connection with Ramadan: Do not fast till you see the new moon, and do not break fast till you see it; but if the weather is cloudy calculate about it....