'Angel of God' in the Bible

The angel of God said to him, "Take the meat and the unleavened cakes, and lay them on this rock, and pour out the broth." And he did so.

Then the woman came and told her husband, saying, "A man of God came to me, and his face was like the face of the angel of God, very awesome; and I didn't ask him where he was from, neither did he tell me his name,

God listened to the voice of Manoah; and the angel of God came again to the woman as she sat in the field: but Manoah, her husband, wasn't with her.