John the Apostle
John 4:2BSB·traditional attribution

(although it was not Jesus who baptized, but His disciples),

John Calvin Reformed @genevareformer

2. Though Jesus himself baptized not. He gives the designation of Christ’s Baptism to that which he conferred by the hands of other, in order to inform us that Baptism ought not to be estimated by the person of the minister, but that its power depends entirely on its Author, in whose name, and by whose authority, it is conferred.

Matthew Henry Presbyterian @wholebiblehenry

We read of Christ's coming into Judea (Joh 3:22), after he had kept the feast at Jerusalem; and now he left Judea four months before harvest, as is said here (Joh 4:35); so that it is computed that he staid in Judea about six months, to build upon the foundation John had laid there. We have no particular account of his sermons and miracles there, only in general, Joh 4:1.

Commenting on John 4:1-3

John Gill Reformed Baptist @doctorgill

Though Jesus himself baptized not,.... And therefore as Nonnus observes, it was a false report that was made to the Pharisees; at least in part, so far as concerns the act of baptizing: though it may be this is observed, not so much to show the falsehood of that report, as to correct what is said of Christ's baptizing; lest it should be understood, as...