2 Kings 1:9

Then King Ahaziah sent to Elijah a captain with his company of fifty men. So the captain went up to Elijah, who was sitting on top of a hill, and said to him, “Man of God, the king declares, ‘Come down!’”
BSB · Berean Standard Bible
Then the king sent unto him a captain of fifty with his fifty. And he went up to him: and, behold, he sat on the top of an hill. And he spake unto him, Thou man of God, the king hath said, Come down.
KJV · King James Version
Then the king sent a captain of fifty with his fifty to him. He went up to him; and behold, he was sitting on the top of the hill. He said to him, “Man of God, the king has said, ‘Come down!’”

Note “Behold”, from “הִנֵּה”, means look at, take notice, observe, see, or gaze at. It is often used as an interjection.

WEB · World English Bible
Then the king sent unto him a captain of fifty with his fifty. And he went up to him: and, behold, he was sitting on the top of the hill. And he spake unto him, O man of God, the king hath said, Come down.
ASV · American Standard Version

Related passages

From the Treasury of Scripture Knowledge, grouped by the word they explain.

sent unto
2 Kings 6:13, 14; 1 Kings 18:4, 10; 1 Kings 19:2; 1 Kings 22:8, 26, 27; Matthew 14:3
he sat
1 Kings 18:42; Luke 6:11, 12
Thou man
Amos 7:12; Matthew 26:68; Matthew 27:29, 41–43; Mark 15:29, 32; Hebrews 11:36