'In the Wilderness' in the Bible

For this is the one who was spoken about by the prophet Isaiah, saying, "The voice of one crying out in the wilderness, 'Prepare the way of the Lord, make his paths straight.'"

Therefore if they say to you, 'Behold, he is in the wilderness,' do not go out, [or] 'Behold, he is in the inner rooms,' do not believe [it]!