NET

15 to execute judgment on all, and to convict every person of all their thoroughly ungodly deeds that they have committed, and of all the harsh words that ungodly sinners have spoken against him.”

Darby

15 to execute judgment against all; and to convict all the ungodly of them of all their works of ungodliness, which they have wrought ungodlily, and of all the hard [things] which ungodly sinners have spoken against him.

KJV

15 To execute judgment upon all, and to convince all that are ungodly among them of all their ungodly deeds which they have ungodly committed, and of all their hard [speeches] which ungodly sinners have spoken against him.