Purity: Ghusl with Hot Water after Unlawful Janabah

Practical Laws of Islam as per the teachings of Ayatullah Sistani

Ruling 372:

If someone who has become junub by unlawful means performs ghusl with hot water, his ghusl is valid even if he sweats [during the ghusl].

-Ayatullah Sistani, Practical Laws of Islam, Purification (Taharah)