Isaiah 27

God promises final judgment on Leviathan (a chaotic mythical sea monster, symbolizing evil) and then declares His renewed protection for Israel, comparing the nation to a vineyard that He will diligently guard and water. God confirms that He will use affliction and judgment to purify Israel, purging their sin and removing their false idols. The chapter concludes with a joyful vision of Israel's return from all the nations where they were scattered, gathering on the holy mountain in Jerusalem to worship the Lord.