Narrated with this chain of narration, from al-Husayn ibn Sa'id, from his brother al-Hasan, from Zur'ah, from Sama'ah, from Abu Abdullah عليه السلام, who said: Imam عليه السلام said: "If a man becomes junub (in a state of major ritual impurity) and wishes to perform ghusl, he should pour water over his hands and wash them below the elbows. Then he should insert his hand into his vessel, wash his private parts, and pour water over his head three times, using his cupped hands. Then, he should strike one handful of water onto his chest and another between his shoulders. After that, he should pour water over his entire body. If any water splashes back into his vessel after performing what I have described, there is no harm in it."