Sunan Abi Dawud 141
سنن أبي داود#141SahihNarrated Abdullah ibn Abbas: The Messenger of Allah (ﷺ) said: Cleanse your nose well (after snuffing up water) twice or thrice
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Zubair Ali ZaiIsnaad Hasan
In-book reference: 1:141