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.
Matthew 2:18
[Jer. 31:15], "A voice was heard in [the town of] Ramah [Note: This was a village near Jerusalem, where Rachel was buried], with crying and deep mourning. It was Rachel crying for her children [Note: Initially this was a reference to the Israelites who were taken to Babylonian captivity. See Jer. 29-31]. She refused to be comforted because they were dead."