Sayyiduna Jabir bin Samurah (may Allah be pleased with them both) narrates: I heard the Prophet Muhammad (peace and blessings be upon him) say: "There will be twelve caliphs after me, all of them will be from the Quraysh." (The narrator says:) When the Prophet Muhammad (peace and blessings be upon him) went to his house, the Quraysh came to him and asked: What will happen after that? The Prophet Muhammad (peace and blessings be upon him) said: Then there will be widespread killing.