NET

15 When I turn the land of Egypt into desolation and the land is destitute of everything that fills it, when I strike all those who live in it, then they will know that I am the Lord.’

Darby

15 When I shall make the land of Egypt a desolation, and the country shall be left desolate of all that was in it, when I have smitten all them that dwell therein, then shall they know that I [am] Jehovah.

KJV

15 When I shall make the land of Egypt desolate, and the country shall be destitute of that whereof it was full, when I shall smite all them that dwell therein, then shall they know that I [am] the LORD.