⁴³ And when they had fulfilled the days, as they returned, the child Jesus tarried behind in Jerusalem; and Joseph and his mother knew not of it.

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,

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