David sat between the two gates It is probable the gates of cities then were, as they now generally are, large and thick, and that, for greater security, they had two gates, one more outward, and the other inward. Here the king sat, that he might hear tidings as soon as they came to the city.
Related Commentaries of 2 Samuel 18:24
2 Samuel 18:24
24 And David sat between the two gates: and the watchman went up to the roof over the gate unto the wall, and lifted up his eyes, and looked, and behold a man running alone.