Sayyiduna Jubayr bin Mut'im (may Allah be pleased with him) narrated: The ritual bath (ghusl) for major impurity (janabah) was mentioned in the presence of the Prophet (peace and blessings be upon him), and he (peace and blessings be upon him) said: "As for me, I pour water over my head three times."
Hadith Referenceالمعجم الكبير للطبراني / باب الجيم / 1476