Sahih al-Bukhari 6864

Arabic

حَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ مُوسَى، عَنِ الأَعْمَشِ، عَنْ أَبِي وَائِلٍ، عَنْ عَبْدِ اللَّهِ، قَالَ قَالَ النَّبِيُّ صلى الله عليه وسلم ‏ "‏ أَوَّلُ مَا يُقْضَى بَيْنَ النَّاسِ فِي الدِّمَاءِ ‏"‏‏.‏

English translation

Narrated `Abdullah:The Prophet (ﷺ) said, "The first cases to be decided among the people (on the Day of Resurrection) will be those of blood-shed

Reference: Sahih al-Bukhari 6864, Book of Blood Money (Ad-Diyat). English translation by Dr. Muhammad Muhsin Khan.