Jerome — as excerpted in the Catena Aurea on Matthew 3:11-12

“In the other Gospels it is, whose shoe latchet I am not worthy to loose. Here his humility, there his ministry is intended; Christ is the Bridegroom, and John is not worthy to loose the Bridegroom’s shoe, that his house be not called according to the Law of Moses and the example of Ruth, The house of him that hath his shoe loosed. (Deut. 25:10.)”