Narrated by the Shaykh (Al-Mufid), may Allah سبحانه وتعالى support him, narrated to me from Ahmad ibn Muhammad, from his father, from al-Husayn ibn al-Hasan ibn Aban, from al-Husayn ibn Sa’id, from Hammad, from Hariz, from Muhammad ibn Muslim, from one of the Imams عليه السلام, who said: Imam عليه السلام said: "The ghusl (ritual bath) is prescribed for seventeen occasions: The night of the 17th of Ramadan, which is the night of 'the meeting of the two hosts.' The night of the 19th, during which the annual records are written. The night of the 21st, the night in which the successors of the prophets were afflicted, during which Jesus son of Mary عليه السلام was raised to the heavens, and Moses عليه السلام passed away. The night of the 23rd, in which the Night of Decree (Laylat al-Qadr) is hoped for. The two Eid days (Eid al-Fitr and Eid al-Adha). When you enter the two sacred sanctuaries (Mecca and Medina). The day you enter into ihram. The day of visitation (ziyarah). The day you enter the Kaaba. The day of Tarwiyah (8th of Dhul-Hijjah). The day of Arafah. When you wash a deceased person, shroud them, or touch them after they have cooled. On Fridays. The ghusl for janabah, which is obligatory. The ghusl for a solar eclipse (kusuf) when the entire disk is darkened - then you should perform ghusl."