and legs—and then inserts his organ into the woman’s vagina, a ritual bath (ghusl) becomes obligatory for both of them even if no semen is discharged, for penetration alone is one of the acts that necessitate ghusl.

Points derived from the ḥadīth
1- The obligation of ghusl upon insertion of the male organ into the vagina, even when no emission occurs.
2- This ḥadīth abrogates the report of Abū Saʿīd, “Water is only from water,” which, understood as an exclusive statement, implies that no ghusl is required except after ejaculation.

Determining the amount of water sufficient for ghusl after major impurity

Abū Jaʿfar Muḥammad ibn ʿAlī ibn al-Ḥusayn ibn ʿAlī ibn Abī Ṭālib, may Allah be pleased with them all, related that he and his father were with Jābir ibn ʿAbd Allāh while a group of people were present. They asked Jābir about ghusl, and he said, “A sāʿ(1) is enough for you.”
A man replied, “It is not enough for me.” Jābir said, “It sufficed someone who had more hair than you and was better than you—meaning the Messenger of Allah ﷺ—and he was more careful than you about his purity and his religion.” In another wording he said, “The Prophet ﷺ would pour water over his head three times.”

The compiler remarks: The man who said, “It is not enough for me,” was al-Ḥasan ibn Muḥammad ibn ʿAlī ibn Abī Ṭālib, whose father was Muḥammad ibn al-Ḥanafiyyah.

Overall meaning: Abū Jaʿfar and his father were in the company of the eminent Companion Jābir ibn ʿAbd Allāh, together with other people. The group asked Jābir how much water suffices for ghusl after major impurity, and he answered, “A sāʿ is sufficient.” Al-Ḥasan ibn Muḥammad ibn al-Ḥanafiyyah, who was among those present, remarked that this amount would not