Jeremiah 16:21 KJV
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.
Jeremiah 16:21, King James Version
In context
20 Shall a man make gods unto himself, and they are no gods?
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.