'Angel of the Lord' in the Bible

But [as] he was considering these things, behold, an angel of the Lord appeared to him in a dream, saying, "Joseph, son of David, do not be afraid to take Mary [as] your wife, for what has been conceived in her is from the Holy Spirit.

And Joseph, [when he] woke up from sleep, did as the angel of the Lord commanded him, and he took his wife

Now [after] they had gone away, behold, an angel of the Lord appeared in a dream to Joseph, saying, "Get up, take the child and his mother and flee to Egypt, and stay there until I tell you. For Herod is about to seek the child to destroy him."

Now [after] Herod had died, behold, an angel of the Lord appeared in a dream to Joseph in Egypt,

And behold, there was a great earthquake, for an angel of the Lord descended from heaven and came up [and] rolled away the stone and sat down on it.

And an angel of the Lord appeared to him, standing at the right side of the altar of incense.

And an angel of the Lord stood near them, and the glory of the Lord shone around them, and {they were terribly frightened}.

But during the night an angel of the Lord opened the doors of the prison and led them [out] [and] said,

Now an angel of the Lord spoke to Philip, saying, "Get up and go toward the south on the road that goes down from Jerusalem to Gaza." (This is a desert [road].)

And behold, an angel of the Lord stood near [him], and a light shone in the prison cell. And striking Peter's side, he woke him up, saying, "Get up {quickly}!" And his chains fell off of [his] hands.

And immediately an angel of the Lord struck him down {because} he did not give the glory to God. And he was eaten by worms [and] died.