Matthew 2:3-6
And when King Herod heard this, he and the entire city of Jerusalem were [very] upset.
Matthew 2:13
Now when they had gone an angel from the Lord appeared to Joseph in a [supernatural] dream, saying, "Get up and take the young child and His mother and hurry to Egypt. Stay there for as long as I tell you to, for Herod will be looking for the young child in order to kill Him."
Matthew 2:16
When Herod saw that he had been tricked by the astrologer/sages, he was furious and sent out [his soldiers] to kill all the baby boys in Bethlehem and its vicinity. This was done to those from two years old and under, basing [their decision] on the exact time determined from the astrologer/sages.