Luke 2:41-45

Now His parents went to Jerusalem every year for the Passover Feast. [Deut 16:1-8; Ex 23:15] And when He was twelve years old, they went up to Jerusalem, according to the custom of the Feast; and 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, but 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. When they did not find Him, they went back to Jerusalem looking for Him [everywhere].