en_tn_condensed/mat/03/06.md

They were baptized by him ... River, confessing their sins

This can be stated in active form. Alternate translation: "John baptized them ... River after they confessed their sins" (See: rc://en/ta/man/jit/figs-activepassive)

They

This refers to the people coming from Jerusalem, Judea, and the region around the Jordan River.