Matthew 2:7

Herod having heard the answer of the priests and scribes, did not think fit to make any noise of it amongst the people; he knew the Jews were apt enough to rebel, and being so little a conqueror had no reason to presume much of their goodwill towards him; he therefore calls the wise men privily, and takes no notice of any King they talked of, but only inquires the time when this new star first appeared. To what end he made this inquiry may be learned from Matthew 2:16; only that he might be able to govern himself in his bloody decree, that he might neither destroy more children than would serve his present design, nor yet leave this Child behind.