Chapter on the Description of Ablution (Wudu)
Tahdhīb al-Aḥkām|Volume 1|Book 1|Chapter 4
عَلِيُّ بْنُ إِبْرَاهِيمَ عَنِ اِبْنِ أَبِي عُمَيْرٍ عَنْ حَمَّادٍ عَنِ اَلْحَلَبِيِّ عَنْ أَبِي عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ قَالَ:« إِنْ ذَكَرْتَ وَ أَنْتَ فِي صَلاَتِكَ أَنَّكَ قَدْ تَرَكْتَ شَيْئاً مِنْ وُضُوئِكَ اَلْمَفْرُوضِ عَلَيْكَ فَانْصَرِفْ فَأَتِمَّ اَلَّذِي نَسِيتَهُ مِنْ وُضُوئِكَ وَ أَعِدْ صَلاَتَكَ وَيَكْفِيكَ مِنْ مَسْحِ رَأْسِكَ أَنْ تَأْخُذَ مِنْ لِحْيَتِكَ بَلَلَهَا إِذَا نَسِيتَ أَنْ تَمْسَحَ رَأْسَكَ فَتَمْسَحَ بِهِ مُقَدَّمَ رَأْسِكَ».
Ali ibn Ibrahim narrated from Ibn Abi Umayr, from Hammad, from al-Halabi:
Abu Abdullah عليه السلام said: Imam عليه السلام said: "If you remember during your prayer that you have left out something from your obligatory ablution, then leave (the prayer), complete what you forgot from your ablution, and repeat your prayer. If you forgot to wipe your head, it is sufficient for you to take moisture from your beard and wipe the front of your head with it."
- Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 1, p. 104
- Ṣaḥīḥ al-Tahdhīb, p. 58