Abu Sa'id told that God's messenger said to `Ali, "It is not allowable, `Ali, for anyone but you or me to be in a state of ceremonial impurity in this mosque." `Ali b. al-Mundhir told that be asked Dirar b. Surad what was the meaning of this tradition, and he replied that the meaning was, "It is not allowable for anyone but you or me to walk through it in a state of ceremonial impurity." Tirmidhi transmitted it, saying this is a hasan gharib tradition.