Luke 3:16

Clement of Alexandria The Instructor Book II

As a witness for simplicity in shoes let John suffice, who avowed that "he was not worthy to unloose the latchet of the Lord's shoes."[252]

Clement of Alexandria Stromata Book V

while he, though speaking more perspicuously as no longer prophesying, but pointing out as now present, Him, who was proclaimed symbolically from the beginning, nevertheless said, "I am not worthy to loose the latchet of the Lord's shoe."[107]

Clement of Alexandria Stromata Book VII

But we say that the fire sanctifies[54]

A Treatise on Re-Baptism by an Anonymous Writer

I think that we have fully followed out the announcement of John the Baptist, whence we began our discourse, when he said to the Jews, "I indeed baptize you with water unto repentance; but He who cometh after me is greater than I, whose shoe's latchet I am not worthy to unloose: He shall baptize you with the Holy Ghost, and with fire."[60]

Pseudo-Gregory Thaumaturgus Fourth Homily

I acknowledge my own servitude, I proclaim Thy glorious greatness, I recognise Thy perfect lordship, I recognise my own perfect insignificance, I am not worthy to unloose the latchets of Thy shoes;[14]

Origen Commentary on John Book VI "John preached, saying, There cometh after me He that is mightier than I, the latchet of whose shoes I am not worthy to stoop down and unloose. I baptized you with water, but He shall baptize you with the Holy Ghost." And Luke says[103]