Chapter on Tayammum (dry ablution) and Its Rules
Tahdhīb al-Aḥkām|Volume 1|Book 1|Chapter 20
عَنْهُ عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنِ اَلْحُسَيْنِ عَنِ اَلْقَاسِمِ عَنِ اَلْحُسَيْنِ بْنِ أَبِي اَلْعَلاَءِ قَالَ: سَأَلْتُ أَبَا عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ عَنِ اَلرَّجُلِ يُجْنِبُ وَ مَعَهُ مِنَ اَلْمَاءِ بِقَدْرِ مَا يَكْفِيهِ لِوُضُوئِهِ لِلصَّلاَةِ أَ يَتَوَضَّأُ بِالْمَاءِ أَوْ يَتَيَمَّمُ قَالَ« يَتَيَمَّمُ أَ لاَ تَرَى أَنَّهُ جُعِلَ عَلَيْهِ نِصْفُ اَلطَّهُورِ».
From him, from Ahmad ibn Muhammad, from Al-Husayn, from Al-Qasim, from Al-Husayn ibn Abi Al-Ala, who said:
I asked Abu Abdullah عليه السلام about a man who becomes junub (in a state of major ritual impurity) and has only enough water to perform wudu (ablution) for prayer. Should he perform wudu with the water or perform tayammum (dry ablution)? Imam عليه السلام said: "He should perform tayammum. Do you not see that half of the purification has been made obligatory upon him?"
- Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 1, p. 428
- Ṣaḥīḥ al-Tahdhīb, p. 105