Luke 2:41-50

41And his parents went yearly to Jerusalem at the feast of the passover.

42And when he was twelve years old, and they went up [to Jerusalem] according to the custom of the feast

43and had completed the days, as they returned, the boy Jesus remained behind in Jerusalem, and his parents knew not [of it];

44but, supposing him to be in the company that journeyed together, they went a day's journey, and sought him among their relations and acquaintances:

45and not having found him they returned to Jerusalem seeking him.

46And it came to pass, after three days they found him in the temple, sitting in the midst of the teachers and hearing them and asking them questions.

47And all who heard him were astonished at his understanding and answers.

48And when they saw him they were amazed: and his mother said to him, Child, why hast thou dealt thus with us? behold, thy father and I have sought thee distressed.

49And he said to them, Why [is it] that ye have sought me? did ye not know that I ought to be [occupied] in my Father's business?

50And they understood not the thing that he said to them.