The Shaykh narrated to me from Abu Al-Qasim Ja’far ibn Muhammad, from Muhammad ibn Ya’qub, from Muhammad ibn Yahya, from Al-Hasan ibn Ali Al-Kufi, from Al-Nawfali, from Ghayath ibn Ibrahim: Abu Abdullah عليه السلام narrated: “Commander of the Faithful عليه السلام said: "There is no wudu (ablution) required from what you step on." Al-Nawfali explained: "It means what you tread upon with your feet."