The Book of Prayers (Kitab Al-Salat) 
Muslim :: Book 4 : Hadith 2122
Abu Marthad al-Ghanawi reported Allah's Messenger (may peace be upon him) as saying: Do not pray facing towards the graves, and do not sit on them.
The Book of Prayers (Kitab Al-Salat)
Muslim :: Book 4 : Hadith 2122
Abu Marthad al-Ghanawi reported Allah's Messenger (may peace be upon him) as saying: Do not pray facing towards the graves, and do not sit on them.