Luke 2:40-44

Now the Child continued to grow and to become strong, increasing in wisdom; and the favor of God was upon Him. Visit to Jerusalem

His parents went to Jerusalem every year at the Feast of the Passover.

And when He was twelve years old, they went up there according to the custom of the feast;

and as they were returning, after spending the full number of days required, the boy Jesus stayed behind in Jerusalem, but His parents were unaware of it.

Instead, they thought that He was somewhere in the caravan, and they went a day’s journey; and then they began looking for Him among their relatives and acquaintances.