Matthew 3:4

John wore clothing made of camels' hair, with a belt of leather round his waist, and his food was locusts and wild honey.

Matthew 11:8

"What did you go out into the Wilderness to look at? A reed waving in the wind? If not, what did you go out to see? A man richly dressed? Why, those who wear rich things are to be found in the courts of kings!

Treasury of Scripture Knowledge

Summary

And as Obadiah was in the way, behold, Elijah met him: and he knew him, and fell on his face, and said, Art thou that my lord Elijah?

Bible References

He knew

Matthew 3:4
John wore clothing made of camels' hair, with a belt of leather round his waist, and his food was locusts and wild honey.
Matthew 11:8
"What did you go out into the Wilderness to look at? A reed waving in the wind? If not, what did you go out to see? A man richly dressed? Why, those who wear rich things are to be found in the courts of kings!