Nahum 1:15 says look to the mountains for the feet of one who brings what?

Answer: Good news

"Look to the mountains, the feet of one who brings good news, who proclaims peace!" Judah could celebrate Nineveh's fall.

“Look to the mountains—the feet of one who brings good news, who proclaims peace! Celebrate your feasts, O Judah; fulfill your vows. For the wicked will never again march through you; they will be utterly cut off.”— Nahum 1:15 (BSB)