KJV:
And they beat down the cities, and on every good piece of land cast every man his stone, and filled it; and they stopped all the wells of water, and felled all the good trees: only in Kirharaseth left they the stones thereof; howbeit the slingers went about it, and smote it.
NASB:
Thus they destroyed the cities; and each one threw a stone on every piece of good land and filled it. So they stopped all the springs of water and felled all the good trees, until in Kir-hareseth only they left its stones; however, the slingers went about it and struck it.