Matthew 3:4

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

John had evidently been schooled in the knowledge that he was to be another Elijah, and he promptly adopted the type of dress that would identify him as "Elijah." In 2 Kings 1:8, Elijah's garb is mentioned, especially the leather girdle. This type of clothing was worn by the prophet for another reason, and that was as a protest against the luxury of the ruling classes in Jerusalem. His austere manner of dress and the wilderness residence pointed the way to the self-denial and repentance which would be the burden of John's preaching.

Locusts and wild honey ... comprised the diet of the herald. The locusts were probably insects somewhat similar to large grasshoppers in the United States. Locusts are still considered edible in many parts of the world. Some believe the "locusts" refer to the pods of the carob tree, called "St. John's bread" by the Jews, and still sold in New York City markets. The prodigal son is represented as eating the pods of the carob beans; and certainly John the Baptist could have eaten such carob pods; however, we are confronted with the simple statement that what he did eat was locusts and wild honey!