Sunan Abi Dawud 4762
سنن أبي داود#4762Sahih‘Arfajah told that he heard the Messenger of Allah (May peace be upon him) as saying :various corruptions will arise in my community, so strike with sword the one who tries to cause separation in the matter of Muslims when they are united, whoever he be
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
Shuaib Al ArnautSahih
Zubair Ali ZaiSahih Muslim (1852)
In-book reference: 42:167