Massacre of the Innocents
The Massacre of the Innocents is the name given to the slaughter, according to the Gospel of Matthew, of all boys "from two years old and under" of Bethlehem when Jesus was born. This was ordered by Herod the Great because he had been informed that, according to old prophesies and the appearance of a star, one of them would be known as "King of the Jews", but he did not know which boy.
However, Joseph, Mary and Jesus had fled to Egypt after they had been warned by an angel.
The Eastern Orthodox Church calls these "Holy Innocents" the first martyrs for Jesus Christ, and commemorates them each year on December 29.
It has been estimated that, if the story is true, 20 to 30 little boys were killed.
The Massacre is not mentioned in any other canonical gospel, nor by any secular historian. However, Jeremiah 31:15 likely alludes to this Massacre: "Thus saith the LORD; A voice was heard in Ramah, lamentation, and bitter weeping; Rahel weeping for her children refused to be comforted for her children, because they were not. (KJV)"
External link: http://elvis.rowan.edu/~kilroy/CHRISTIA/library/infancy2.html