‏الصلاة : Hadeeth No:2094 It is narrated on the authority of Abu Sa'id al-Khudri that the Prophet (sallAllaahu alayhi wa sallam) said: Whenever you come across a bier you should stand up, and he who follows it should not sit down till it is placed on the ground....

‏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....