Matthew 2:3-6
When King Herod heard of this, he was much troubled, and so, too, was all Jerusalem.
Matthew 2:13
After they had left, an angel of the Lord appeared to Joseph in a dream, and said: "Awake, take the child and his mother, and seek refuge in Egypt; and stay there until I bid you return, for Herod is about to search for the child, to put him to death."
Matthew 2:16
When Herod found that he had been trifled with by the Astrologers, he was very angry. He sent and put to death all the boys in Bethlehem and the whole of that neighborhood, who were two years old or under, guided by the date which he had ascertained from the Astrologers.