'Foundations' in the Bible

Let it be known to the king that the Jews who came from you have returned to us at Jerusalem. They are rebuilding that rebellious and evil city, finishing its walls, and repairing its foundations.

In the first year of King Cyrus, he issued a decree concerning the house of God in Jerusalem: Let the house be rebuilt as a place for offering sacrifices, and let its original foundations be retained. Its height is to be 90 feet and its width 90 feet,