John Calvin on Luke 2:39

39. They returned to Galilee The departure to Egypt, I readily acknowledge, came between those events; and the fact mentioned by Luke, that they dwelt in their own city Nazareth, is later, in point of time, than the flight into Egypt, which Matthew relates, (Matthew 2:14.) But if there was no impropriety in one Evangelist leaving out what is related by another, there was nothing to prevent Luke from overleaping the period which he did not intend to mention, and passing at once to the following history. I am very far from agreeing with those who imagine that Joseph and Mary, after having finished the sacrifice of purification, returned to Bethlehem, to live there. Those persons are foolish enough to believe, that Joseph had a settled abode in a place where he was so little known, that he was unable to find a temporary lodging. Nor is it without a good reason that Luke says, with respect both to Joseph and Mary, that Nazareth was their own city We infer from it, that he never was an inhabitant of Bethlehem, though it was the place of his extraction. “Combien que ce fust le pays de ses ancestres;” — “though it was the country of his ancestors.” As to the order of time, I shall presently give a more full explanation.

MATTHEW 2:13-18

Matthew 2:13-18

13. And when they had departed, lo, the angel of the Lord appeared in dreams to Joseph, saying, Arise, and take the young child and his mother, and flee into Egypt, and be thou there until I have told thee: for Herod will seek the young child to destroy him. 14. And he, when awake, took the young child and his mother by night, and withdrew into Egypt: 15. And was there until the death of Herod; that it might be fulfilled which was spoken by the Lord through the prophet, saying, Out of Egypt have I called my Son. 16. Then Herod, when he saw that he was mocked by the Magi, was exceedingly enraged, and sent to slay “Mittens interfecit;” — “sending slew.” all the children that were in Bethlehem, and all its boundaries, “Et en toutes les marches d'icelle;” — “and in all the marches thereof.” from two years old and under, according to the time which he had inquired at the Magi. 17. Then was fulfilled what had been spoken by Jeremiah the Prophet, when he says, 18. A voice was heard in Ramah, lamentation, wailing, and much weeping: Rachel bewailing her children, and refused to receive consolation, because they are not.