Bath (Ghusl)

Every Muslim needs to know how to do ghusl otherwise you can't pray solat and and enter mosque.

Obligatory bath (Ghusl) means to apply water to every part of the body. Allah Said: "...If you are in state of Janaba (i.e. after a sexual discharge), purify yourself (bathe your whole body) (Ghusl)..." V.5:6).

O you who believe!...Nor (are you allowed to enter the mosque) if you are junub until you have washed yourself except passing through."(4:43

O you who believe! Do not go near prayers (solat) when you are... junub until you have washed yourselves. (4:43) O you who believe! When you stand up for prayers (solat), . . . if you are junub, then purify (yourselves). (5:6)