Matthew 3:4

And John himself had his raiment of camels hair, and a leathern girdle about his loins; and his food was locusts and wild honey.

Matthew 11:8

But why did ye go out? to see a man clothed in soft raiment? Lo! they that wear soft clothing are in kings houses.

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
And John himself had his raiment of camels hair, and a leathern girdle about his loins; and his food was locusts and wild honey.
Matthew 11:8
But why did ye go out? to see a man clothed in soft raiment? Lo! they that wear soft clothing are in kings houses.