Chapter on Tayammum and Its Rules
Tahdhīb al-Aḥkām|Volume 1|Book 1|Chapter 8
فَأَمَّا اَلْخَبَرُ اَلَّذِي رَوَاهُ مُحَمَّدُ بْنُ عَلِيِّ بْنِ مَحْبُوبٍ عَنِ اَلْعَبَّاسِ عَنْ أَبِي هَمَّامٍ عَنِ اَلرِّضَا عَلَيْهِ اَلسَّلاَمُ قَالَ:« يُتَيَمَّمُ لِكُلِّ صَلاَةٍ حَتَّى يُوجَدَ اَلْمَاءُ».
As for the narration reported by Muhammad ibn Ali ibn Mahbub from al-‘Abbas, from Abu Hammam, from Imam al-Ridha عليه السلام:
Imam عليه السلام said: "One performs tayammum for every prayer until water is found."
- Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 1, p. 212
- Ṣaḥīḥ al-Tahdhīb