Al-Kāfi

Hadith 1249
prostration
6ـ أَحْمَدُ بْنُ إِدْرِيسَ وَغَيْرُهُ عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنْ عَلِيِّ بْنِ إِسْمَاعِيلَ عَنْ مُحَمَّدِ بْنِ عَمْرِو بْنِ سَعِيدٍ عَنْ أَبِي الْحَسَنِ الرِّضَا (صلّى اللهُ عَلَيْهِ وَآلِه) قَالَ لاَ تَسْجُدْ عَلَى الْقِيرِ وَلاَ عَلَى الصَّارُوجِ.
6. Ahmad ibn Idris and others have narrated Ahmad ibn Muhammad from Ali ibn ’Isma‘il from Muhammad ibn ‘Umar ibn Sa‘id who has said the following: “Abu al-Hassan (a.s.), has said, ‘You must not perform Sajdah (prostration) on graves and on a mix of lime and construction compound.’”
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī