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Luke 2:43
Robinson-Pierpont Byzantine Textform · Berean Standard Bible
καὶ τελειωσάντων τὰς ἡμέρας, ἐν τῷ ὑποστρέφειν αὐτούς, ὑπέμεινεν Ἰησοῦς ὁ παῖς ἐν Ἱερουσαλήμ· καὶ οὐκ ἔγνω Ἰωσὴφ καὶ ἡ μήτηρ αὐτοῦ·
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.