'Angel of the Lord' in the Bible

And God's anger was kindled because he went: and the angel of the LORD stood in the way for an adversary against him. Now he was riding upon his ass, and his two servants were with him.

And the ass saw the angel of the LORD standing in the way, and his sword drawn in his hand: and the ass turned aside out of the way, and went into the field: and Balaam smote the ass, to turn her into the way.

But the angel of the LORD stood in a path of the vineyards, a wall being on this side, and a wall on that side.

And when the ass saw the angel of the LORD, she thrust herself against the wall, and crushed Balaam's foot against the wall: and he smote her again.

And the angel of the LORD went further, and stood in a narrow place, where was no way to turn either to the right hand or to the left.

And when the ass saw the angel of the LORD, she fell down under Balaam: and Balaam's anger was kindled, and he smote the ass with a staff.

Then the LORD opened the eyes of Balaam, and he saw the angel of the LORD standing in the way, and his sword drawn in his hand: and he bowed down his head, and fell flat on his face.

And the angel of the LORD said to him, Why hast thou smitten thy ass these three times? behold, I went out to withstand thee, because thy way is perverse before me:

And Balaam said to the angel of the LORD, I have sinned; for I knew not that thou stoodest in the way against me: now therefore, if it displeaseth thee, I will return again.

And the angel of the LORD said to Balaam, Go with the men: but only the word that I shall speak to thee, that thou shalt speak: So Balaam went with the princes of Balak.