Lit., “work sin.” Compare Mat 7:23; Act 10:35; Heb 11:33. The phrase is rather stronger than the more common ἁμαρτίαν ποιεῖν, to do sin, Joh 8:34; Jam 5:15; 1Pe 2:22. The position of sin is emphatic: “it is sin that ye are working.”
And are convinced (ἐλεγχόμενοι)
Rather, as Rev., convinced. The word, which is variously rendered in A. V. tell a fault, reprove, rebuke, convince, while it carries the idea of rebuke, implies also a rebuke which produces a conviction of the error or sin. See on Joh 8:46. Compare Joh 3:20; Joh 8:9; 1Co 14:24, 1Co 14:25.