A.T. Robertson Commentary Luke 2:39

"And when they had accomplished all things that were according to the law of the Lord, they returned into Galilee, to their own city Nazareth." — Luke 2:39 (ASV)

To their own city Nazareth (εις πολιν εαυτων Ναζαρετ). See on Mt 2:23 about Nazareth. Luke tells nothing of the flight to Egypt and the reason for the return to Nazareth instead of Bethlehem, the place of the birth of Jesus as told in Mt 2:13-23. But then neither Gospel gives all the details of this period. Luke has also nothing about the visit of the wise men (Matthew 2:1–12) as Matthew tells nothing of the shepherds and of Simeon and Anna (Luke 2:8–28). The two Gospels supplement each other.