John the Apostle
John 1:33ESV·traditional attribution

I myself did not know him, but he who sent me to baptize with water said to me, ‘He on whom you see the Spirit descend and remain, this is he who baptizes with the Holy Spirit.’

John Calvin Reformed @genevareformer

33. Upon whom thou shalt see the Spirit descending. Here a difficult question arises; for if John did not know Christ, why does he refuse to admit him to baptism? To a person whom he did not know he would not say, I ought rather to be baptized by thee, (Matthew 3:14.) Some reply, that he knew him to such an extent as to regard...

Matthew Henry Presbyterian @wholebiblehenry

We have in these verses an account of John's testimony concerning Jesus Christ, which he witnessed to his own disciples that followed him. As soon as ever Christ was baptized he was immediately hurried into the wilderness, to be tempted; and there he was forty days.

Commenting on John 1:29-36

John Gill Reformed Baptist @doctorgill

And I knew him not,.... That is, before he came to be baptized by him; when it was secretly suggested to him who he was, and the following signal was given him, to confirm him in it: but he that sent me to baptize with water; or "in water"; that is, God; for John's mission was from God, as in Joh 1:6, and his baptism...