Sunan Abi Dawud 4894
سنن أبي داود#4894SahihAbu Hurairah reported the Messenger of Allah (May peace be upon him) as saying:when two men abuse one another, what they say is laid to the charge of the one who began it, so long as the one who is wronged does not go over the score
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 (2587)
In-book reference: 43:122