John Gill Commentary 2 Kings 6:9

"And the man of God sent unto the king of Israel, saying, Beware that thou pass not such a place; for thither the Syrians are coming down." — 2 Kings 6:9 (ASV)

And the man of God sent to the king of Israel
That is, Elisha sent to him: saying,

beware that you do not pass such a place :
not go to it, but avoid it, and pass another way:

for there the Syrians are come down :
are hidden, as the Targum; lie covered at the bottom of the hill, so as not to be seen.