2 Samuel 18:23-24

18:23 But he said, “Whatever happens, I want to go!” So Joab said to him, “Then go!” So Ahimaaz ran by the way of the Jordan plain, and he passed the Cushite.

18:24 Now David was sitting between the inner and outer gates, and the watchman went up to the roof over the gate at the wall. When he looked, he saw a man running by himself.