וְיֵ֤ט יָדוֹ֙ עַל־צָפ֔וֹן וִֽיאַבֵּ֖ד אֶת־אַשּׁ֑וּר וְיָשֵׂ֤ם אֶת־נִֽינְוֵה֙ לִשְׁמָמָ֔ה צִיָּ֖ה כַּמִּדְבָּֽר׃
And He will stretch out His hand against the north, And destroy Assyria; And will make Nineveh a desolation, And dry like the wilderness.
Rashi on Zephaniah
on the north Assyria is on the north, neighboring on Babylon.