Sunan Abi Dawud 4031
سنن أبي داود#4031SahihNarrated Abdullah ibn Umar: The Prophet (ﷺ) said: He who copies any people is one of them
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniHasan Sahih
Muhammad Muhyi Al-Din Abdul HamidHasan Sahih
Zubair Ali ZaiHasan
In-book reference: 34:12