Luke 2:42

39 And when they had done all the things which were ordered by the law of the Lord, they went back to Galilee, to Nazareth, the town where they were living.

40 And the child became tall and strong and full of wisdom, and the grace of God was on him.

41 And every year his father and mother went to Jerusalem at the feast of the Passover.

42 And when he was twelve years old, they went up, as their way was, to the feast;

43 And when the days of the feast came to an end and they were going back, the boy Jesus was still in Jerusalem, but they had no knowledge of it:

44 And in the belief that he was with some of their number, they went a day's journey; and after looking for him among their relations and friends,

45 And seeing that he was not there, they went back to Jerusalem, to make search for him.