Verse 2
God is jealous - For his own glory.
And - revengeth - His justice; by the destruction of his enemies.
And is furious - So powerful in the manifestations of his judgments, that nothing can stand before him.
He reserveth wrath - Though they seem to prosper for a time, and God appears to have passed by their crimes without notice, yet he reserveth - treasureth up - wrath for them, which shall burst forth in due time.