Objects on Which Sajdah Is Permissible and What Is Undesirable
Al-Kāfi|Volume 3|Book 4|Chapter 27
8ـ مُحَمَّدُ بْنُ يَحْيَى بِإِسْنَادِهِ قَالَ قَالَ أَبُو عَبْدِ الله (عَلَيْهِ الْسَّلام) السُّجُودُ عَلَى الأرْضِ فَرِيضَةٌ وَعَلَى الْخُمْرَةِ سُنَّةٌ.
8. Muhammad ibn Yahya has narrated through the chain of narrators has said the following: “Abu ’Abd Allah عليه السلام, has said, ’Performing Sujud (prostration) on earth is obligatory and on a prayer mat is a tradition.”
- Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (5/148)
- Ṣaḥīḥ al-Kāfī