The Book of Prayer - Funerals
11/32. Chapter:
The prohibition of plastering graves or erecting structures over them
Sahih Muslim
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا حَفْصُ بْنُ غِيَاثٍ، عَنِ ابْنِ جُرَيْجٍ، عَنْ أَبِي، الزُّبَيْرِ عَنْ جَابِرٍ، قَالَ نَهَى رَسُولُ اللَّهِ صلى الله عليه وسلم أَنْ يُجَصَّصَ الْقَبْرُ وَأَنْ يُقْعَدَ عَلَيْهِ وَأَنْ يُبْنَى عَلَيْهِ .
Jabir said: Allah's Messenger (ﷺ) 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.
Reference : Sahih Muslim 970aIn-book reference : Book 11, Hadith 121USC-MSA web (English) reference : Book 4, Hadith 2116