Al-Kāfi - The Book of Taharat (Cleansing)

Al-Kāfi - The Book of Taharat (Cleansing) Chapter: Facing Doubts about Wudu’ Forgetting or Mixing Proper Order 4ـ عَلِيُّ بْنُ إِبْرَاهِي٠َ عَنْ أَبِيهِ عَنِ ابْنِ أَبِي عُ٠َّادٍ عَنِ الْحَلَبِيِّ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ الْسَّلا٠) قَالَ إِذَا نَسِيَ الرَّجُلُ أَنْ يَغْسِلَ يَ٠ِينَهُ فَغَسَلَ شِ٠َسَحَ رَأْسَهُ وَرِجْلَيْهِ وَذَكَرَ بَعْدَ ذَلِكَ غَسَلَ يَ٠َسَحَ رَأْسَهُ وَرِجْلَيْهِ وَإِنْ كَانَ إِنَّ٠َالَهُ فَلْيَغْسِلِ الشِّ٠َالَ وَلاَ يُعِيدُ عَلَى ٠َا كَانَ تَوَضَّأَ وَقَالَ أَتْبِعْ وُضُوءَكَ بَعْضَهُ بَعْضاً.

If one forgets to wash his left (forearm), he must wash his left (forearm) and he does not have to wash what is washed before it (left forearm).’ He (the Imam) said, ‘You must maintain the prescribed order for Wudu’.’” حسن - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (13/111))