Sunan al-Nasa'i The Book of Fighting [The Prohibition of Bloodshed] ibn Umar Muhammad bin Ja'far bin Abi Kathir محمد بن جعفر بن أبي كثير Muhammad bin Zayd bin 'Abdullah محمد بن زيد بن عبد الله بن عمر Shu'bah bin al-Hajjaj شعبة بن الحجاج Waqid bin Muhammad bin Zayd واقد بن محمد بن زيد بن عبد الله “The Messenger of Allah said: ‘Whoever fights for a cause that is not clear, advocating tribalism, getting angry for the sake of tribalism, then he has died a death of Jahiliyyah.'” https://parallelquran.com/hadith/sunan-al-nasai-4125/