A Star

While the shepherds came to worship Jesus at his birth, the wise men came to worship Him when He was “a young child” at a house. The wise men were not at the manger with the shepherds.

"Now when Jesus was born in Bethlehem of Judaea in the days of Herod the king, behold, there came wise men from the east to Jerusalem, saying, Where is he that is born King of the Jews? for we have seen his star in the east, and are come to worship him." - Matthew 2:1-2 

How did these Gentile wise men hear about this star and the birth of the King of the Jews?

Perhaps the wise men were searching for the star spoken of by the Gentile prophet Balaam.

"I shall see him, but not now: I shall behold him, but not nigh: there shall come a Star out of Jacob, and a Sceptre shall rise out of Israel…" - Numbers 24:17 [Star – “metaphor used of an illustrious prince” – Gesenius Lexicon]

Isaiah prophesied of the visitation of the wise men (kings).

"And the Gentiles shall come to thy light, and kings to the brightness of thy rising." - Isaiah 60:3 

"And he sent them to Bethlehem, and said, Go and search diligently for the young child; and when ye have found him, bring me word again, that I may come and worship him also. When they had heard the king, they departed; and, lo, the star, which they saw in the east, went before them, till it came and stood over where the young child was." - Matthew 2:8-9 

"And when they were come into the house, they saw the young child with Mary his mother, and fell down, and worshipped him: and when they had opened their treasures, they presented unto him gifts; gold, and frankincense, and myrrh. And being warned of God in a dream that they should not return to Herod, they departed into their own country another way." - Matthew 2:11-12 

The Lord warned Joseph to take Jesus and His mother and flee into Egypt.

"Then Herod, when he saw that he was mocked of the wise men, was exceeding wroth, and sent forth, and slew all the children that were in Bethlehem, and in all the coasts thereof, from two years old and under, according to the time which he had diligently enquired of the wise men." - Matthew 2:16