Theophylact of Ohrid
Catena Aurea · Lukasevangelium 2
And when they had performed all things according to the law of the Lord, they returned into Galilee, to their own city Nazareth. And the child grew, and waxed strong in spirit, filled with wisdom: and the grace of God was upon him. Now his parents went to Jerusalem every year at the feast of the Passover.
Now our Lord might have come forth from the womb in the stature of mature age, but this would seem like something imaginary; therefore His growth is gradual, as it follows, And the child grew, and waxed strong.