It is narrated from Sayyiduna Ali (may Allah be pleased with him), he says: I was a man who had a lot of madhiy (pre-seminal fluid), so I asked the Noble Prophet (peace and blessings be upon him), and he (peace and blessings be upon him) said: "When you emit semen, perform ghusl due to janabah, and when you do not emit semen, then do not perform ghusl."