Sunan an-Nasa'i 424
سنن النسائي#424SahihIt was narrated that 'Aishah said:"When the Messenger of Allah (ﷺ) performed Ghusl from Janabah, he would call for something like a vessel used for milking a she-camel, then he would take (some water) in his hand and start with the right side of his head, then the left, then take (some water) in his hands and start pouring it on his head
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih Isnaad
Al-AlbaniSahih Isnaad
Zubair Ali ZaiSahih - Agreed Upon
In-book reference: 4:29