Uthman ibn Affan
A group of seven hundred Egyptians came to complain to Caliph Uthman ibn Affan about their governor Ibn Abi Sarh's tyranny, so Uthman ibn Affan said: "Choose someone to govern you." They chose Muhammad ibn Abu Bakr, so Uthman ibn Affan wrote credentials for him and they returned. On their way back, at three days' distance from Madinah, a messenger caught up with them with the news that he carried orders from Uthman ibn Affan to the governor of Egypt. They searched him and found a message from Uthman ibn Affan to ibn Abi Sarh ordering the death of Muhammad ibn Abi Bakr and some of his friends. They returned to Madinah and besieged Uthman ibn Affan. Uthman ibn Affan acknowledged that the camel, the servant, and the seal on the letter belonged to him, but he swore that he had never written nor ordered the letter to be written. It was discovered that the letter had been hand-written by Marwan ibn al-Hakam.However another report is as follows: Around the time of mid-day prayers, Uthman was alone inside the house with his wife Naila, reading the Qur'an. Some Egyptian rebels climbed the houses of the neighbors and then jumped into Uthman's. According to the account of al-Waqidi (d. 823), Muhammad ibn Abi Bakr held the beard of Uthman threatening to kill him. Uthman rebuked him and asked him to leave. Muhammad pierced his forehead with an arrow. However according to another report, Muhammad desisted from killing Uthman after the latter reminded him of his father Abu Bakr. Muhammad then vainly tried defending him from the attackers.