Chapter on the Rulings on Forgetfulness (Ahkam al-Sahw)
Tahdhīb al-Aḥkām|Volume 2|Book 1|Chapter 16
عَنْهُ عَنْ مُوسَى بْنِ اَلْقَاسِمِ عَنْ عَلِيِّ بْنِ جَعْفَرٍ عَنْ أَخِيهِ مُوسَى بْنِ جَعْفَرٍ عَلَيْهِمَا اَلسَّلاَمُ قَالَ: سَأَلْتُهُ عَنِ اَلرَّجُلِ يَكُونُ خَلْفَ اَلْإِمَامِ فَيُطَوِّلُ اَلْإِمَامُ اَلتَّشَهُّدَ فَيَأْخُذُ اَلرَّجُلَ اَلْبَوْلُ أَوْ يَتَخَوَّفُ عَلَى شَيْءٍ يَفُوتُ أَوْ يَعْرِضُ لَهُ وَجَعٌ كَيْفَ يَصْنَعُ قَالَ« يَتَشَهَّدُ هُوَ وَ يَنْصَرِفُ وَ يَدَعُ اَلْإِمَامَ»
From him, from Musa ibn al-Qasim from Ali ibn Ja‘far from his brother (Imam) Musa ibn Ja‘far عليه السلام, peace be upon them both, who said:
I asked Imam عليه السلام about a man who is behind the Imam (of prayer), and the Imam (of prayer) prolongs the tashahhud, and the man is taken by the need to urinate, or he fears something may be missed, or he experiences pain, what should he do? Imam عليه السلام said: "He should recite the tashahhud himself and leave, and leave the Imam."
- Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 2, p. 375
- Ṣaḥīḥ al-Tahdhīb