What is the ruling regarding someone who prayed while being in a state of major ritual impurity (junub), knowing this after performing ablution (wudu') with the intention of removing minor ritual impurity, out of fear of missing the prayer's time, and is the place where he prostrated considered ritually impure (najis) and must it be washed?

If a person in a state of ritual impurity (janabah) finds water and is able to use it, their prayer is not valid until they perform ghusl (ritual bath), as Allah Almighty says: (Nor those in a state of ritual impurity, except while passing through, until you have washed yourselves) [An-Nisa 4:43].

However, if they do not find water or are prevented from using it due to illness or similar reasons, they should perform tayammum (dry ablution) as Allah Almighty says: (And you find no water, then take for yourselves clean earth and wipe over your faces and hands) [An-Nisa 4:43], and their prayer will be valid.

If a person in a state of janabah wakes up late and fears that the prayer time will expire if they perform ghusl, they are obligated to perform ghusl even if the time expires. This is the preponderant opinion.

So, if someone in a state of janabah performs only wudu (ablution) for fear of the time expiring and prays, their prayer is invalid, and they must perform ghusl and repeat the prayer.

The body and sweat of a person in a state of janabah are pure, as the Prophet, peace and blessings be upon him, said: "Indeed, a Muslim does not become impure."