Matthew 2:2 provides the basis for their joy—they saw the star they had seen in the East.

Psalm 67:4 calls the nations to be glad; the Magi as Gentiles embody that joy at Christ's birth.

Psalm 105:3 invites those who seek the Lord to rejoice; the Magi sought and rejoiced.

Luke 2:10 announces great joy for all people; the Magi experience that joy.

Acts 13:46-48 describes Gentiles rejoicing at the gospel; the Magi are the firstfruits of that Gentile joy.

Romans 15:9-13 quotes OT about Gentiles rejoicing; the Magi’s joy foreshadows this Gentile inclusion.