Muhammad ibn Ali ibn Mahbub, from Ya'qub ibn Yazid, from Ibn Abi Umayr, from Umar ibn Udhaynah, from Zurarah. He (Narrator) said: “I heard Abu Ja'far عليه السلام, say: ‘(Imam) Al-Husayn ibn Ali عليه السلام, would cleanse himself after defecation with cotton and would not wash (with water for istinja).’"