Chapter on the Rulings of Missed Prayers

And from him, from Ahmad ibn Muhammad from al-Husayn ibn Said from Muhammad ibn Abi Umayr from Muhammad ibn Humran and Jamil ibn Darraj. They said: I said to Aba Abdillah عليه السلام: “An imam (of prayer) of a group, who becomes junub (ritually impure due to major impurity) during travel, and does not have enough water for ghusl, should someone among them who has wudu lead them in prayer?” Imam عليه السلام said: “No. Rather, the one in a state of janabah should perform tayammum and lead them in prayer, for Allah سبحانه وتعالى, Mighty and Exalted, has made the earth a purifier.”