(33) باب النَّهْىِ عَنِ الْجُلُوسِ، عَلَى الْقَبْرِ وَالصَّلاَةِ عَلَيْهِ
Abu Marthad al-Ghanawi reported Allah's Messenger (ﷺ) as saying:
Do not pray facing towards the graves, and do not sit on them. (FR)
Reference (FR): Sahih Muslim 972 b (FR)
In-book reference (FR): Book 11, Hadith 127 (FR)
USC-MSA web (English) reference(deprecated numbering scheme): Book 4, Hadith 2122 (FR)