Sunan an-Nasa'i 91
سنن النسائي#91SahihIt was narrated that 'Ali called for (water for) Wudu', then he rinsed his mouth and nose, and he sniffed up water and blew it out using his left hand. He did that three times, then he said:"This is how the Prophet of Allah (ﷺ) purified himself
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 ZaiIsnaad Sahih
In-book reference: 1:91