Greeting the Worshipper
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 52
وَ سَأَلَ عَمَّارٌ اَلسَّابَاطِيُّ أَبَا عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ: عَنِ اَلتَّسْلِيمِ عَلَى اَلْمُصَلِّي فَقَالَ «إِذَا سَلَّمَ عَلَيْكَ رَجُلٌ مِنَ اَلْمُسْلِمِينَ وَ أَنْتَ فِي اَلصَّلاَةِ فَرُدَّ عَلَيْهِ فِيمَا بَيْنَكَ وَ بَيْنَ نَفْسِكَ وَ لاَ تَرْفَعْ صَوْتَكَ.
Ammar al-Sabati asked Imam Jafar ibn Muhammad Al-Sadiq عليه السلام about greeting someone while in prayer. Imam عليه السلام said: "If a man from the Muslims greets you while you are in prayer, respond to him within yourself and do not raise your voice”.
- Ṣaḥīḥ al-Faqīh