'Work of God' in the Bible

Then ceased the work of God's house which is at Jerusalem; and it ceased until the second year of the reign of Darius king of Persia.

and kept the feast of unleavened bread seven days with joy: for the LORD had made them joyful, and had turned the heart of the king of Assyria to them, to strengthen their hands in the work of God's house, the God of Israel.