• performing ablution after vomiting (Majmūʿat al-Rasāʾil, 2/234);
• performing ablution after every minor impurity; see al-Targhīb, 1/99 no. 4.
13 – Acts that make a full ritual bath (ghusl) obligatory
1 – The ejaculation of semen brought about by sexual desire: “When you discharge semen, perform the bath for major ritual impurity; if you do not discharge, do not bathe.” (Aḥmad, 1/107) — narrated by Jawāb al-Taymī from Yazīd ibn Sharīk, meaning al-Taymī, from ʿAlī, traced back to the Prophet. The chain is ḥasan: its transmitters are trustworthy except for Jawāb, who is reliable yet was accused of irjāʾ, as stated in al-Taqrīb.
In another wording transmitted through a different route (1/109) and by Abū Dāwūd (1/32): “When you forcefully emit semen, perform the bath.” Its chain is good.
2 – Its emission during a wet dream; in this ruling women are like men (1). It is related from Umm Salama that Umm Sulaym said, “Messenger of Allah, Allah is not shy of the truth; is a bath required of a woman…"