Discovery BoxMatthew 1:20 
Context1:20 When he had contemplated this, an 1 angel of the Lord 2 appeared to him in a dream and said, “Joseph, son of David, do not be afraid to take Mary as your wife, because the child conceived in her is from the Holy Spirit.
Matthew 1:22
Context1:22 This all happened so that what was spoken by the Lord through the prophet would be fulfilled:
Matthew 1:24
Context1:24 When Joseph awoke from sleep he did what the angel of the Lord 3 told him. He took his wife,
1 tn Grk “behold, an angel.” The Greek word ἰδού (idou) has not been translated because it has no exact English equivalent here, but adds interest and emphasis (BDAG 468 s.v. 1).
2 tn Or “the angel of the Lord.” Linguistically, “angel of the Lord” is the same in both testaments (and thus, he is either “an angel of the Lord” or “the angel of the Lord” in both testaments). For arguments and implications, see ExSyn 252; M. J. Davidson, “Angels,” DJG, 9; W. G. MacDonald argues for “an angel” in both testaments: “Christology and ‘The Angel of the Lord’,” Current Issues in Biblical and Patristic Interpretation, 324-35.
3 tn See the note on the word “Lord” in 1:20. Here the translation “the angel of the Lord” is used because the Greek article (ὁ, Jo) which precedes ἄγγελος (angelos) is taken as an anaphoric article (ExSyn 217-19) referring back to the angel mentioned in v. 20.
