Luke 2:43-45

Young's Literal Translation

⁴³ and having finished the days, in their returning the child Jesus remained behind in Jerusalem, and Joseph and his mother did not know,

⁴⁴ and, having supposed him to be in the company, they went a day's journey, and were seeking him among the kindred and among the acquaintances,

⁴⁵ and not having found him, they turned back to Jerusalem seeking him.