831 - وَ رُوِيَ عَنْ يَاسِرٍ اَلْخَادِمِ أَنَّهُ قَالَ: مَرَّ بِي أَبُو اَلْحَسَنِ عَلَيْهِ اَلسَّلاَمُ وَ أَنَا أُصَلِّي عَلَى اَلطَّبَرِيِّ وَ قَدْ أَلْقَيْتُ عَلَيْهِ شَيْئاً فَقَالَ لِي «مَا لَكَ لاَ تَسْجُدُ عَلَيْهِ أَ لَيْسَ هُوَ مِنْ نَبَاتِ اَلْأَرْضِ.
Hadith.831 - It was narrated from the Yāsir al-Khadim that He said:
"Abu al-Hasan 
passed by me while I was praying on a piece of ṭabarī (a mat) upon which I had placed something.
Imam said to me: 'Why do you not prostrate on it? Is it not from what the earth produces?'"
