2 Samuel 18:4-5

4The king said to them, ‘I will do whatever you think is good.’ So he stood beside the gate of the city while his army marched out. They marched out in their groups of hundreds and of thousands.

5The king commanded Joab, Abishai and Ittai, ‘Because the young man Absalom is my son, do not hurt him.’ All the soldiers heard David give this command to the three officers.