Banded - Vine's Expository Dictionary of New Testament Words
Banded[ 1,,G4160 G4963,poieo sustrophen ] Acts 23:12, of the Jews who banded together" with the intention of killing Paul, consists of the verb poieo, "to make," and the noun sustrophe, primarily "a twisting up together, a binding together;" then, "a secret combination, a conspiracy." Accordingly it might be translated "made a conspiracy." The noun is used elsewhere in Acts 19:40. See CONCOURSE.