Man Lā Yaḥḍuruh al-Faqīh
Hadith 782782 - وَ سَأَلَ مُحَمَّدُ بْنُ مُسْلِمٍ أَبَا جَعْفَرٍ عَلَيْهِ اَلسَّلاَمُ فَقَالَ لَهُ: أَ يُصَلِّي اَلرَّجُلُ وَ هُوَ مُتَلَثِّمٌ فَقَالَ «أَمَّا عَلَى اَلدَّابَّةِ فَنَعَمْ وَ أَمَّا عَلَى اَلْأَرْضِ فَلاَ.
Hadith.782 - Muhammad ibn Muslim asked Imam Muhammad ibn Ali Al-Baqir (as):
"Can a man pray while covering his mouth (muffling)?"
Imam (as) said: "While on an animal, yes; but on the ground, no”.