Luke 2:43-45

New American Standard Bible

⁴³ and as they were returning, after spending the ^(A)full number of days required, the boy Jesus stayed behind in Jerusalem, but His parents were unaware of it. ⁴⁴ 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. ⁴⁵ And when they did not find Him, they returned to Jerusalem, looking for Him.