What was narrated by Muhammad bin Ali bin Mahbub, from Harun bin Muslim, from Mas'adah bin Ziyad, from Imam Ja’far Al Sadiq عليه السلام, from his father Imam Al Baqir عليه السلام, from his forefathers عليه السلام: Imam عليه السلام said: The Prophet (may Allah سبحانه وتعالى bless him and his family) said to one of his wives: 'Instruct the women of the believers to perform istinja (washing) with water and to be thorough in it, for it purifies the surrounding areas and prevents hemorrhoids.'