Intelligence officers refused to meet with Omar Khadr.
 This version of events, fully accepted by Shia scholars, is generally rejected by Sunni scholars who, in view of other reports in their literature, believe that Ali gave an oath of alliance to Abu Bakr without any grievance
When al-Mughira forced Abu Lu'lu'a to pay a kharj tax of two dirhams a day, Abu Lu'lu'a turned to Umar to protest this tax

