⁴³ and had completed the days, as they returned, the boy Jesus remained behind in Jerusalem, and his parents knew not [of it];

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

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,