Sunan an-Nasa'i 249
سنن النسائي#249SahihIt was narrated from 'Aishah that the Messenger of Allah (ﷺ) used to soak his head, then he would pour water over it three times
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih
In-book reference: 1:250