Origen
Catena Aurea · Lukasevangelium 2
And when he was twelve years old, they went up to Jerusalem after the custom of the feast. And when they had fulfilled the days, as they returned, the child Jesus tarried behind in Jerusalem; and Joseph and his mother knew not of it. But they, supposing him to have been in the company, went a day’s journey; and they sought him among their kinsfolk and acquaintance. And when they found him not, they turned back again to Jerusalem, seeking him. And it came to pass, that after three days they found him in the temple, sitting in the midst of the doctors, both hearing them, and asking them questions. And all that heard him were astonished at his understanding and answers. And when they saw him, they were amazed: and his mother said unto him, Son, why hast thou thus dealt with us? behold, thy father and I have sought thee sorrowing. And he said unto them, How is it that ye sought me? wist ye not that I must be about my Father’s business? And they understood. not the saying which he spake unto them.
The holy Virgin knew that He was not the Son of Joseph, and yet calls her husband His father according to the belief of the Jews, who thought that He was conceived in the common way. Now to speak generally we may say, that the Holy Spirit honoured Joseph by the name of father, because he brought up the Child Jesus; but more technically, that it might not seem superfluous in St. Luke, bringing down the genealogy from David to Joseph. But why sought they Him sorrowing? Was it that he might have perished or been lost? It could not be. For what should cause them to dread the loss of Him whom they knew to be the Lord? But as whenever you read the Scriptures you search out their meaning with pains, not that you suppose them to have erred or to contain anything incorrect, but that the truth which they have inherent in them you are anxious to find out; so they sought Jesus, lest perchance leaving them he should have returned to heaven, thither to descend when He would. He then who seeks Jesus must go about it not carelessly and idly, as many seek Him who never find Him, but with labour and sorrow.