Liaison office of Grand Ayatullah Sayyid Ali Al Sistani (L.M.H.L) in London, Europe, North and South America.
Ruling 356. The ghusl for janābah is obligatory for obligatory prayers and suchlike, but it is not necessary for ṣalāt al-mayyit, sajdatā al-sahw, the prostration for offering thanks (sajdat al-shukr), and for the obligatory prostrations of the Qur’an.
Ruling 357. It is not necessary that at the time of performing ghusl one make the intention of performing an obligatory ghusl; rather, it is sufficient if one performs ghusl with only the intention of qurbah, i.e. in humility to the Lord of the worlds.
Ruling 358. If a person is certain that the time for prayers has set in and he makes the intention of performing an obligatory ghusl, and afterwards he realises that actually he performed ghusl before the time for prayers had set in, his ghusl is valid.
Ruling 359. Two types of ghusls for janābah can be performed: sequential (tartībī) and immersive (irtimāsī).