I was a man who emitted a great deal of madhi. I asked the Prophet ﷺ and he said: “If you ejaculate, then do ghusl for janabah, and if you do not ejaculate, then do not do ghusl.”
كُنْتُ رَجُلًا مَذَّاءً فَسَأَلْتُ النَّبِيَّ ﷺ فَقَالَ إِذَا خَذَفْتَ فَاغْتَسِلْ مِنَ الْجَنَابَةِ وَإِذَا لَمْ تَكُنْ خَاذِفًا فَلَا تَغْتَسِلْ