'Foundations' in the Bible

They set up the altar on its foundations, because {they were in terror} because of the peoples of the lands. And they offered burnt offerings on it for Yahweh, burnt offerings for the morning and the evening.

In the first year of King Cyrus, he issued forth a decree concerning the house of God in Jerusalem. Let the house be built, the place where sacrifices are offered and let its foundations be raised. Its height [shall be] sixty cubits and its width sixty cubits,