Charles Ellicott Commentary 2 Kings 6:10

"And the king of Israel sent to the place which the man of God told him and warned him of; and he saved himself there, not once nor twice." — 2 Kings 6:10 (ASV)

Sent—A sufficient force to hold the place, so that the Syrians had to return unsuccessful.

Warned—Ezekiel 3:19; 2 Chronicles 19:10.

Saved himself.—Was wary; on his guard (2 Kings 6:9).

Not once nor twice refers to the statement of the entire verse. On more than one occasion, and in regard to different inroads of the Syrians, Elisha gave the king forewarning.