'Work of the Lord' in the Bible

Cursed is he that does the work of the LORD deceitfully, and cursed is he that keeps back his sword from blood.

The LORD has opened his armory, and has brought forth the weapons of his indignation: for this is the work of the Lord GOD of hosts in the land of the Chaldeans.

The LORD has brought forth our righteousness: come, and let us declare in Zion the work of the LORD our God.