Man Lā Yaḥḍuruh al-Faqīh
Hadith 803803 - وَقَالَ إِبْرَاهِيمُ بْنُ أَبِي مَحْمُودٍ لِلرِّضَا عَلَيْهِ اَلسَّلاَمُ: اَلرَّجُلُ يُصَلِّي عَلَى سَرِيرٍ مِنْ سَاجٍ وَ يَسْجُدُ عَلَى اَلسَّاجِ قَالَ «نَعَمْ.
Hadith.803 - Ibrahim ibn Abi Mahmoud said to Imam Ali ibn Musa Ar-Ridha (as) about a man who prays on a bed made of teakwood and prostrates on the teakwood itself.
Imam (as) replied: "Yes, there is no issue”.