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].
Berean Study Bible (BSB) - Luke 2:43 >When those days were over and they were returning home, the boy Jesus remained behind in Jerusalem, but His parents were unaware He had stayed.
Textus Receptus (TR) - Luke 2:43 >καὶ τελειωσάντων τὰς ἡμέρας, ἐν τῷ ὑποστρέφειν αὐτούς, ὑπέμεινεν Ἰησοῦς ὁ παῖς ἐν Ἱερουσαλήμ· καὶ οὐκ ἔγνω Ἰωσὴφ καὶ ἡ μήτηρ αὐτοῦ·