'Roots' in the Bible

You plant them like trees and they put down their roots. They grow prosperous and are very fruitful. They always talk about you, but they really care nothing about you.

For he shall be as a tree planted by the waters, and that spreadeth out her roots by the river, and shall not see when heat cometh, but her leaf shall be green; and shall not be careful in the year of drought, neither shall cease from yielding fruit.