Hadith
أَخْبَرَنَا مُحَمَّدُ بْنُ الْعَلاَءِ، قَالَ حَدَّثَنَا أَبُو مُعَاوِيَةَ، قَالَ حَدَّثَنَا الأَعْمَشُ، عَنْ شَقِيقٍ، عَنْ عَبْدِ اللَّهِ، قَالَ أَوَّلُ مَا يُقْضَى بَيْنَ النَّاسِ فِي الدِّمَاءِ .
It was narrated that 'Abdullah said:"The first matter concerning which scores will be settled among the people will be bloodshed
Sahih · Abu Ghuddah
Sunan an-Nasa'i 3996 ·Book 37, Hadith 31·Also available on sunnah.com·