Luke 2:47

43 When those days were over and they were returning home, the boy Jesus remained behind in Jerusalem, but His parents were unaware He had stayed.

44 Assuming He was in their company, they traveled on for a day before they began to look for Him among their relatives and friends.

45 When they could not find Him, they returned to Jerusalem to search for Him.

46 Finally, after three days they found Him in the temple courts, sitting among the teachers, listening to them and asking them questions.

47 And all who heard Him were astounded at His understanding and His answers.

48 When His parents saw Him, they were astonished. “Child, why have You done this to us?” His mother asked. “Your father and I have been anxiously searching for You.”

49 “Why were you looking for Me?” He asked. “Did you not know that I had to be in My Father’s house?”

50 But they did not understand the statement He was making to them.

51 Then He went down to Nazareth with them and was obedient to them. But His mother treasured up all these things in her heart.

Read all of Luke 2