The Shaykh narrated to me from Ahmad ibn Muhammad, from his father, from Al-Husayn ibn Al-Hasan ibn Aban, from Al-Husayn ibn Sa'id, from Hammad, from Hariz, from Zurara, who said: I said to Abu Ja'far عليه السلام: "What about the one in the standing places (mawaqif) who is not in a state of ablution (wudu) and is unable to descend (to access water)? What should he do?" Imam عليه السلام said: "He should perform tayammum using the saddle pad, his saddle, or the bridle of his mount, for they contain dust, and then he should pray."