Luke 2:41-45

41Now His parents went to Jerusalem every year for the Passover Feast.

42And when He was twelve years old, they went up to Jerusalem, according to the custom of the Feast;

43and as they were returning [to Nazareth], after spending the required number of days [at the Feast], the boy Jesus remained behind in Jerusalem. Now His parents did not know this,

44but supposed Him to be in the caravan, and traveled a day’s journey; and [then] they began searching [anxiously] for Him among their relatives and acquaintances.

45When they did not find Him, they went back to Jerusalem looking for Him [everywhere].