'Angel of the Lord' in the Bible

either three years of famine, or three months to be swept away before your enemies, while the sword of your enemies overtakes you, or else three days of the sword of the Lord and plague in the land, and the angel of the Lord bringing destruction throughout all the territory of Israel.’ Now therefore, consider what answer I shall return to Him who sent me.”

God sent an angel to Jerusalem to destroy it; and as he was destroying it, the Lord looked, and relented concerning the catastrophe and said to the destroying angel, “It is enough; now remove your hand [of judgment].” And the angel of the Lord was standing by the threshing floor of Ornan the Jebusite.

Then David raised his eyes and saw the angel of the Lord standing between earth and heaven, having a drawn sword in his hand stretched out over Jerusalem. Then David and the elders, covered in sackcloth, fell on their faces.

Then the angel of the Lord commanded Gad to say to David, that David should go up and build an altar to the Lord on the threshing floor of Ornan the Jebusite.

But David could not go before it to inquire of God, for he was terrified by the sword of the angel of the Lord.