The Chapter on Tayammum (Dry Ablution)
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 22
وَ سَأَلَ عَبْدُ اَللَّهِ بْنُ سِنَانٍ أَبَا عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ: عَنِ اَلرَّجُلِ تُصِيبُهُ اَلْجَنَابَةُ فِي اَللَّيْلَةِ اَلْبَارِدَةِ وَ يَخَافُ عَلَى نَفْسِهِ اَلتَّلَفَ إِنِ اِغْتَسَلَ فَقَالَ «يَتَيَمَّمُ وَ يُصَلِّي فَإِذَا أَمِنَ مِنَ اَلْبَرْدِ اِغْتَسَلَ وَ أَعَادَ اَلصَّلاَةَ.
Abdullah ibn Sinan asked Imam Jafar ibn Muhammad Al-Sadiq عليه السلام about a man who becomes junub (ritually impure) during a cold night and fears for his life if he performs ghusl (ritual bathing). Imam عليه السلام said: 'He should perform tayammum and pray, and when he is safe from the cold, he should perform ghusl and repeat the prayer.'
- Ṣaḥīḥ al-Faqīh