'Mounds' in the Bible

Behold, the mounds, they are come to the city to take it; and the city is given into the hand of the Chaldeans who fight against it, because of the sword, and of the famine, and of the pestilence; and what you have spoken has happened; and behold, you see it.

For thus says Yahweh, the God of Israel, concerning the houses of this city, and concerning the houses of the kings of Judah, which are broken down [to make a defense] against the mounds and against the sword;