The One Praying Who Needs to Relieve Himself
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 54
وَ سَأَلَهُ عَمَّارُ بْنُ مُوسَى: عَنِ اَلرَّجُلِ يَسْمَعُ صَوْتاً بِالْبَابِ وَ هُوَ فِي اَلصَّلاَةِ فَيَتَنَحْنَحُ لِيُسْمِعَ جَارِيَتَهُ أَوْ أَهْلَهُ لِتَأْتِيَهُ فَيُشِيرَ إِلَيْهَا بِيَدِهِ لِيُعْلِمَهَا مَنْ بِالْبَابِ لِتَنْظُرَ مَنْ هُوَ فَقَالَ «لاَ بَأْسَ بِهِ» وَ عَنِ اَلرَّجُلِ وَ اَلْمَرْأَةِ يَكُونَانِ فِي اَلصَّلاَةِ وَ يُرِيدَانِ شَيْئاً أَ يَجُوزُ لَهُمَا أَنْ يَقُولاَ سُبْحَانَ اَللَّهِ قَالَ «نَعَمْ وَ يُومِيَانِ إِلَى مَا يُرِيدَانِ وَ اَلْمَرْأَةُ إِذَا أَرَادَتْ شَيْئاً ضَرَبَتْ عَلَى فَخِذَيْهَا وَ هِيَ فِي اَلصَّلاَةِ.
Ammar ibn Musa asked him about a man who hears a sound at the door while he is in prayer and clears his throat to make his servant or family member hear, so that they come and look to see who is at the door. Imam عليه السلام said: "There is no harm in that." He also asked about a man and a woman who are in prayer and want something, whether it is permissible for them to say "SubhanAllah سبحانه وتعالى." Imam عليه السلام said: "Yes, and they can gesture to what they want. And a woman, when She wants something, can strike her thighs while in prayer."
- Ṣaḥīḥ al-Faqīh