64 - Muhammad informed us, saying: Waki' informed us, from Shu'bah, from Mukhariq al-Ahmasi, from Tariq ibn Shihab, who said: 'Umar ibn al-Khattab, may Allah have mercy on him, wrote to the people of Kufa: "Whoever is oppressed by his amir (leader), then he has no authority over him except through me." He said: Thus, a man would come to al-Mughirah ibn Shu'bah and say: "Either you grant me justice from yourself, or you have no authority over me."