Sunan Abi Dawud 3861
سنن أبي داود#3861HasanNarrated Abu Hurayrah: The Prophet (ﷺ) said: If anyone has himself cupped on the 17th, 19th and 21st it will be a remedy for every disease
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniHasan
Muhammad Muhyi Al-Din Abdul HamidHasan
Zubair Ali ZaiIsnaad Hasan
In-book reference: 29:7