Matthew 3:4

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

Matthew 11:8

But what went ye out to see? a man in soft raiment; Behold, those wearing soft raiment 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 camel's hair, and a leathern girdle about his loins; and his food was locusts and wild honey.
Matthew 11:8
But what went ye out to see? a man in soft raiment; Behold, those wearing soft raiment are in kings' houses.