Nahjul Balagha Letter 13

To two of the officers in his army

I have placed Malik bin Harith Ashtar in command over you and over all those under you. Therefore, follow his commands and take him as the armour and shield for yourselves, because he is one of those from whom I have no fear of weakness nor any mistake, nor laziness where haste is more appropriate, nor haste where slackness is expected of him.