Pseudo-Chrysostom
Catena Aurea · Matthäusevangelium 3
Then cometh Jesus from Galilee to Jordan unto John, to be baptized of him. But John forbad Him, saying, I have need to be baptized of Thee, and comest Thou to me? And Jesus answering said unto him, Suffer it to be so now: for thus it becometh us to fulfil all righteousness. Then he suffered Him.
Then, that is when John preached, that He might confirm his preaching, and Himself receive his witness. But as when the morning-star has risen, the sun does not wait for that star to set, but rising as it goes forward, gradually obscures its brightness; so Christ waited not for John to finish his course, but appeared while he yet taught.