Matthew 2:13, 19

Now when they were departed, behold, an angel of the Lord appeareth to Joseph in a dream, saying, Arise and take the young child and his mother, and flee into Egypt, and be thou there until I tell thee: for Herod will seek the young child to destroy him.

But when Herod was dead, behold, an angel of the Lord appeareth in a dream to Joseph in Egypt, saying