Musannaf Ibn Abi Shaybah

Muhammad says that when Hujr ibn ‘Adi was brought to Mu‘awiyah, Mu‘awiyah said, "O Commander of the Faithful! Peace be upon you!" Mu‘awiyah replied, "Am I the Commander of the Faithful?" He said, "Yes." Mu‘awiyah said, "Even so, I will kill you." Then he ordered Hujr ibn ‘Adi to be killed. Hujr said, "Allow me to perform two rak‘ahs (units) of prayer." Upon being granted permission, he performed two brief rak‘ahs and then said, "Do not think about me that I shortened the prayer out of fear; rather, I dislike that I should prolong the prayer in your presence." Then he was killed.