Chapter on Tayammum (dry ablution) and Its Rules
Tahdhīb al-Aḥkām|Volume 1|Book 1|Chapter 20
عَنْهُ عَنِ اَلْعَبَّاسِ عَنِ اِبْنِ اَلْمُغِيرَةِ عَنْ عَبْدِ اَللَّهِ بْنِ بُكَيْرٍ عَنْ أَبِي عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ قَالَ: قُلْتُ لَهُ رَجُلٌ أَمَّ قَوْماً وَ هُوَ جُنُبٌ وَ قَدْ تَيَمَّمَ وَ هُمْ عَلَى طَهُورٍ قَالَ« لاَ بَأْسَ فَإِذَا تَيَمَّمَ اَلرَّجُلُ فَلْيَكُنْ ذَلِكَ فِي آخِرِ وَقْتٍ فَإِنْ فَاتَهُ اَلْمَاءُ فَلَنْ تَفُوتَهُ اَلْأَرْضُ».
From him, from Al-Abbas, from Ibn Al-Mughira, from Abdullah ibn Bukayr, narrated from Abu Abdullah عليه السلام:
I said to Imam عليه السلام: "A man led a group in prayer while he was in a state of janabah (major ritual impurity) and had performed tayammum (dry ablution), whereas they were in a state of purity." Imam عليه السلام said: "There is no problem. When a man performs tayammum, let it be at the end of the time (for prayer). For if he misses water, he will not miss the earth."
- Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 1, p. 428
- Ṣaḥīḥ al-Tahdhīb, p. 105