The Chapter on Tayammum (Dry Ablution)
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 22
وَقَالَ اَلصَّادِقُ عَلَيْهِ اَلسَّلاَمُ: «اَلْمَبْطُونُ وَ اَلْكَسِيرُ يُؤَمَّمَانِ وَ لاَ يُغَسَّلاَنِ.
Imam Jafar ibn Muhammad Al-Sadiq عليه السلام said: 'One who is suffering from a severe stomach illness or has broken bones should perform tayammum and should not perform ghusl (ritual bathing).'.
- Ṣaḥīḥ al-Faqīh