LXX Gen 21:10

καὶ εἶπεν τῷ Ἀβραάμ Ἔκβαλε τὴν παιδίσκην ταύτην καὶ τὸν υἱὸν αὐτῆς· οὐ γὰρ μὴ κληρονομήσει ὁ υἱὸς τῆς παιδίσκης μετὰ τοῦ υἱοῦ μου Ἰσαάκ.

and she said to Abraham, “Expel the slave woman and her son, for the slave woman’s son will never share in the inheritance with my son Isaac!”