The Messenger of Allah (ﷺ) washed himself with water from a vessel (measuring seven to eight seers) because of sexual intercourse.
Sahih Muslim Book 3, Hadith 48
← Previous Hadith When the Messenger of Allah (ﷺ) took a bath because of sexual intercourse, he called for a vessel and took a handful of water from it and first (washed) the right side of his head, then left, and then took a handful (of water) and poured it on his head.

Sahih Muslim Book 3, Hadith 47 Next Hadith → The Messenger of Allah (ﷺ) took a bath from the vessel (which contained seven to eight seers, i. e. fifteen to sixteen pounds) of water And I and he (the Holy Prophet) took a bath from the same vessel. And in the hadith narrated by Sufyan the words are:" from one vessel". Qutaiba said: Al-Faraq is three Sa' (a cubic measuring of varying magnitude).

Sahih Muslim Book 3, Hadith 49