Mark 1:5
And people from throughout all the regions of Judea and all of Jerusalem went out to John [in the desert]. And he immersed them in the Jordan River as they confessed their sins.
Acts 19:18
Many of the believers also came confessing their sins and describing what they had [previously] done.
Matthew 3:5-6
[People from] Jerusalem and all over Judea and the region around the Jordan River all went out [to the desert] to [hear] him,
Matthew 4:25
Large crowds followed Him from Galilee, Decapolis, Jerusalem, Judea and from beyond [i.e., the east side of] the Jordan River.
John 1:28
These things happened in Bethany on the east side of the Jordan River where John was immersing people. [Note: This was a different Bethany from the one just outside of Jerusalem].
John 3:23
John [the Immerser] was also immersing people in Aenon, near Salem [Note: These locations are thought to have been in northeastern Judea, near the Jordan River], because there was a lot of water there; so people were coming to be immersed.
Acts 2:38
And Peter replied, "Every one of you must repent [i.e., change your hearts and lives] and be immersed in the name of Jesus Christ [i.e., by His authority] so that your sins will be forgiven [by God] and then you will receive the gift of the Holy Spirit [to live in your hearts].
1 John 1:8-10
If we claim to have no sinful practices [in our lives], we are self-deceived and are not being truthful about the matter.