Luke 2:42 WEB

⁴⁰  The child was growing, and was becoming strong in spirit, being filled with wisdom, and the grace of God was upon him.

⁴¹  His parents went every year to Jerusalem at the feast of the Passover.

⁴²  When he was twelve years old, they went up to Jerusalem according to the custom of the feast,

⁴³  and when they had fulfilled the days, as they were returning, the boy Jesus stayed behind in Jerusalem. Joseph and his mother didn't know it,

⁴⁴  but supposing him to be in the company, they went a day's journey, and they looked for him among their relatives and acquaintances.