“They were baptized
In the Jordan River,
Confessing their sins.”
καὶ ἐβαπτίζοντο ἐν τῷ Ἰορδάνῃ ποταμῷ ὑπ’ αὐτοῦ ἐξομολογούμενοι τὰς ἁμαρτίας αὐτῶν.
Once again, Matthew followed Mark, chapter 1:5. All these people were baptized by John in the Jordan River (καὶ ἐβαπτίζοντο ἐν τῷ Ἰορδάνῃ ποταμῷ ὑπ’ αὐτοῦ), which would have been north of the Dead Sea and Jerusalem. Jewish baptisms were not that uncommon. Washing was a physical and spiritual cleansing for sins, as people were unclean or dirty. Thus, in the process of this spiritual cleansing, they would confess their sins (ἐξομολογούμενοι τὰς ἁμαρτίας αὐτῶν). John’s baptism had a few unique qualities since it was a moral statement with an expectation of a coming Messiah or savior.