New Revised Standard Version
Now David was sitting between the two gates. The sentinel went up to the roof of the gate by the wall, and when he looked up, he saw a man running alone.

Contemporary English Version
Meanwhile, David was sitting between the inner and outer gates in the city wall. One of his soldiers was watching from the roof of the gate-tower. He saw a man running toward the town

New American Bible
Now David was sitting between the two gates, and a lookout mounted to the roof of the gate above the city wall, where he looked out and saw a man running all alone.

Douay-Rheims Bible
And David sat between the two gates: and the watchman that was on the top of the gate upon the wall, lifting up his eyes, saw a man running alone.

And David sat between the two gates: and the watchman that was on the top of the gate upon the wall, lifting up his eyes, saw a man running alone.

between

2 Samuel 18:4 And the king said to them: What seemeth good to you, that will I do. And the king stood by the gate: and all the people went forth by their troops, by hundreds and by thousands.

1 Samuel 4:13 And when he was come, Heli sat upon a stool over against the way, watching. For his heart was fearful for the ark of God. And when the man was come into the city, he told it: and all the city cried out.

the watchman

2 Kings 9:17-20 The watchman therefore, that stood upon the tower of Jezrahel, saw the troop of Jehu coming, and said: I see a troop. And Joram said: Take a chariot, and send to meet them, and let him that goeth say: Is all well? . . .

Isaiah 21:6-9,11,12 For thus hath the Lord said to me: Go, and set a watchman: and whatsoever he shall see, let him tell. . . .

Ezekiel 33:2-7 Son of man, speak to the children of thy people, and say to them: When I bring the sword upon a land, if the people of the land take a man, one of their meanest, and make him a watchman over them: . . .