Water; Its Purity and Impurity
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 2
وَقَالَ اَلصَّادِقُ عَلَيْهِ اَلسَّلاَمُ: «إِذَا كَانَ اَلْمَاءُ قَدْرَ قُلَّتَيْنِ لَمْ يُنَجِّسْهُ شَيْءٌ وَ اَلْقُلَّتَانِ جَرَّتَانِ.
Imam Jafar ibn Muhammad Al-Sadiq عليه السلام, said: "If the water is the amount of two qullas, nothing can make it impure, and two qullas are (equal to) two jars”.
- Ṣaḥīḥ al-Faqīh