I will turn your towns into ruins and you will be desolate. Then you will know that I am the LORD.
NIV
I will lay your cities waste and you shall be desolate, and you shall know, understand, and realize that I am the Lord [the Sovereign Ruler, Who calls forth loyalty and obedient service].
AMP
I will lay thy cities waste, and thou shalt be desolate, and thou shalt know that I am the LORD.
KJV
"So I will inflict punishment on Egypt, and they will know that I am the LORD."
NIV
Thus will I execute judgments and punishments upon Egypt. Then shall they know (understand and realize) that I am the Lord [the Sovereign Ruler, Who calls forth loyalty and obedient service].
AMP
Thus will I execute judgments in Egypt: and they shall know that I am the LORD.
KJV