Sayyiduna Abdullah (may Allah be pleased with him) narrates from the Prophet (peace and blessings be upon him) that he (peace and blessings be upon him) said: "On the Day of Resurrection, the first matters to be decided among the people will be those of blood (i.e., murder)."
Hadith Referenceمسند الشهاب / 212
Hadith Gradingمحدثین:إسناده صحيح
Hadith Takhrij«إسناده صحيح ، أخرجه البخاري : 6533، ومسلم : 1678، وترمذي : 1397، وابن ماجه : 2615»