Nor because they are Abraham’s descendants are they all his children. On the contrary, “Through Isaac your offspring will be reckoned.”
Textus Receptus (TR) - Romans 9:7 >οὐδ᾿ ὅτι εἰσὶ σπέρμα Ἀβραάμ, πάντες τέκνα· ἀλλ᾿ Ἐν Ἰσαὰκ κληθήσεταί σοι σπέρμα.