Now after Jesus was born in Bethlehem of Judea in the days of Herod the king, behold, wise men from the East came to Jerusalem, saying “Where is He who has been born King of the Jews? For we have seen His star in the East and have come to worship Him.” (Matthew 2:1–2) The original meaning of mάgoi is likely in view here—wise men who interpreted special signs. There are at least three reasons for this identification. First, they acknowledged that they were interested in signs in the heavens. Second, the Bible states that they were from “the East,” which would be in the direction of Babylon and ancient Persia. Third, of all the peoples of “the East,” the Babylonians had many opportunities to learn of the Jewish Scriptures, which contain multiple promises of the coming Messiah. Daniel was an influential government official in Babylon about 600 years earlier, and he foretold the coming of the Messiah (Daniel 9:24–26). Also, tens of thousands of Jews lived in Babylon during the time of the Exile (605–536 BC), and they maintained a large presence there for the following centuries. (source)

Curious how they learned of Jesus, when and where they saw him, click Answers in genesis 

“We Three Kings”, also known as “We Three Kings of Orient Are” or “The Quest of the Magi”, is a Christmas carol that was written by John Henry Hopkins, Jr., in 1857. At the time of composing the carol, Hopkins served as the rector of Christ Episcopal Church in Williamsport, Pennsylvania, and he wrote the carol for a Christmas pageant in New York City. It remains one of the most popular and most frequently sung Christmas carols today (Wikipedia)