Luke 2:4
So Joseph also went up from the town of Nazareth in Galilee to Judea, to Bethlehem the town of David, because he belonged to the house and line of David — the genealogical reason for the Bethlehem journey is Joseph's Davidic lineage. The town of David (Bethlehem, 1 Samuel 17:12, 20:6) is the ancestral registration site for the house of David. The journey from Galilee to Judea (the geographical ascent — going up to Jerusalem is always going up in the Jewish geographical imagination) is a real journey of about ninety miles.