Chapter on Rules of Janabah and Methods of Purification
Tahdhīb al-Aḥkām|Volume 1|Book 1|Chapter 6
وَ بِهَذَا اَلْإِسْنَادِ عَنِ اَلْحُسَيْنِ بْنِ سَعِيدٍ عَنِ اِبْنِ سِنَانٍ عَنِ اِبْنِ مُسْكَانَ عَنْ أَبِي بَصِيرٍ قَالَ: سَأَلْتُ أَبَا عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ عَنِ اَلْوُضُوءِ فَقَالَ« كَانَ رَسُولُ اَللَّهِ صَلَّى اَللَّهُ عَلَيْهِ وَ آلِهِ يَتَوَضَّأُ بِمُدٍّ مِنْ مَاءٍ وَ يَغْتَسِلُ بِصَاعٍ».
Narrated with this chain of narration, from al-Husayn ibn Sa'id, from Ibn Sinan, from Ibn Muskan, from Abu Basir, who said:
I asked Abu Abdullah عليه السلام about wudu. Imam عليه السلام said: "The Messenger of Allah سبحانه وتعالى (peace be upon him and his family) used to perform wudu with a mudd of water and perform ghusl with a sa‘."
- Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 1, p. 143
- Ṣaḥīḥ al-Tahdhīb