John Chrysostom — as excerpted in the Catena Aurea on John 4:1-6

“(Hom. xxxi. 1) Christ Himself did not baptize, but those who reported the fact, in order to raise the envy of their hearers, so represented it as to appear that Christ Himself baptized. (non occ.). The reason why He baptized not Himself, had been already declared by John, He shall baptize you with the Holy Ghost and with fire. (Luke 3:16) Now He had not yet given the Holy Spirit: it was therefore fitting that He should not baptize. But His disciples baptized, as an efficacious mode of instruction; better than gathering up believers here and there, as had been done in the case of Simon and his brother. Their baptism, however, had no more virtue than the baptism of John; both being without the grace of the Spirit, and both having one object, viz. that of bringing men to Christ.”