Chapter on the Description of Ablution (Wudu)
Tahdhīb al-Aḥkām|Volume 1|Book 1|Chapter 4
وَ رُوِيَ عَنِ اِبْنِ عَبَّاسٍ أَيْضاً أَنَّهُ قَالَ: غَسْلَتَانِ وَ مَسْحَتَانِ..
It was also narrated from Ibn Abbas that he said (regarding ablution): "Two washings and two wipings."
- Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 1, p. 66
- Ṣaḥīḥ al-Tahdhīb