NET
21 The Lord said, “So I will now let this wicked people know—I will let them know my mighty power in judgment. Then they will know that my name is the Lord.
Darby
21 Therefore, behold, I will this once cause them to know, I will cause them to know my hand and my might; and they shall know that my name is Jehovah.
KJV
21 Therefore, behold, I will this once cause them to know, I will cause them to know mine hand and my might; and they shall know that my name [is] The LORD.