'Work of the Lord' in the Bible

Cursed be he that doeth the work of the LORD deceitfully, and cursed be he that keepeth back his sword from blood.

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