Al-Kāfi - The Book of Prayer

Chapter: Recitations in Salah (prayer) َّدِ بْنِ الْحُسَيْنِ عَنِ ابْنِ ٠َحْبُوبٍ عَنِ ابْنِ رِئَابٍ عَنِ الْحَلَبِيِّ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ الْسَّلا٠) قَالَ سَأَلْتُهُ هَلْ يَقْرَأُ الرَّجُلُ فِي صَلاَتِهِ وَثَوْبُهُ عَلَى فِيهِ قَالَ لاَ بَأْسَ بِذَلِكَ إِذَا أَسْ٠َعَ أُذُنَيْهِ الْهَ٠15.

It is a narration from him (narrator of previous Hadith) by Muhammad ibn al-Husayn from ibn Mahbub from ibn Ri’ab from al- Halabiy who has said the following: “I once asked abu ‘Abd Allah (a.s.), ’Can one recite in Salah (prayer) with his clothes on his mouth? He (the Imam) said, ‘It is not harmful if his ears can hear his humming.’” صحيح - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (5/111))