Gregory the Great
Catena Aurea · Markusevangelium 1
John did baptize in the wilderness, and preach the baptism of repentance for the remission of sins. And there went out unto him all the land of Judæa, and they of Jerusalem, and were all baptized of him in the river of Jordan, confessing their sins. And John was clothed with camel’s hair, and with a girdle of a skin about his loins; and he did eat locusts and wild honey; And preached, saying, There cometh one mightier than I after me, the latchet of whose shoes I am not worthy to stoop down and unloose. I indeed have baptized you with water: but he shall baptize you with the Holy Ghost.
(Moral. xxxi. 25) Or, by the kind itself of his food he pointed out the Lord, of whom he was the forerunner; for in that our Lord took to Himself the sweetness of the barren Gentiles, he ate wild honey. In that He in His own person partly converted the Jews, He received locusts for His food, which suddenly leaping up, at once fall to the ground. For the Jews leaped up when they promised to fulfil the precepts of the Lord; but they fell to the ground, when by their evil works they affirmed that they had not heard them. They made therefore a leap upwards in words, and fell down by their actions.