15 You people of Judah, look! A messenger will be coming across the mountains,

and he [SYN] will be bringing good news to you.

He will be declaring that you will now have peace because Assyria will have been conquered.

So, celebrate your festivals,

and do what you solemnly promised to do when your enemies were threatening to attack you,

because your wicked enemies will not invade your country again,

because they will be completely destroyed.