It was narrated that ‘Ali said: “I was one who had a lot of prostatic discharge, and the Messenger of Allah صلی اللہ علیہ وآلہ وسلم said to me: ‘If you see Madhi (prostatic fluid) then wash your penis and perform Wudu’ like that for Salah, but if you ejaculate semen, then perform Ghusl.” (Sahih)