Joy because they found Jesus, the Messiah

When they saw the star, they rejoiced with exceeding great joy. 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. Matthew 2:10‭-‬11 KJV https://bible.com/verse-of-the-day/mat.2.10-11/67202