Chapter 25 of the Book of Ezekiel contains a number of proclamations against the enemies of Judah and Jerusalem, namely against Ammon and the Ammonites, against Moab, against Edom, and against the Philistines. Verse 17 of the chapter is part of the proclamation against the latter group.
According to the New Revised Standard Version of the Bible, Ezekiel 25:17 states, βI will execute great vengeance on them with wrathful punishments. Then they shall know that I am the Lord, when I lay my vengeance on them.β