
The Junub (a person in a state of major ceremonial impurity) cannot enter the Masjid except if passing through. It is impermissible for him to sit therein, as Almighty Allah says: "O you who have believed, do not approach prayer while you are intoxicated until you know what you are saying or in a state of janabah, except those passing through [a place of prayer], until you have washed [your whole body] …" Prophet Muhammad, Peace Be upon Him, said: "I do not make the mosque lawful for a menstruating woman and for the Junub." Sunan Abi Dawoud (232), Graded Sahih by Ibn Khuzaymah. Review: Fatawa al-Lajnah al-Da'imah – 2 (5/259).