BIB(i)
7 οὐδ’ (Nor) ὅτι (because) εἰσὶν (they are) σπέρμα (seed) Ἀβραάμ (of Abraham) πάντες (are all) τέκνα (children); ἀλλ’ (rather), “Ἐν (In) Ἰσαὰκ (Isaac) κληθήσεταί (will be named) σοι (to you) σπέρμα (offspring)”
8 τοῦτ’ (That) ἔστιν (is), οὐ (not) τὰ (the) τέκνα (children) τῆς (of the) σαρκὸς (flesh), ταῦτα (these are) τέκνα (children) τοῦ (-) Θεοῦ (of God); ἀλλὰ (but) τὰ (the) τέκνα (children) τῆς (of the) ἐπαγγελίας (promise) λογίζεται (are regarded) εἰς (as) σπέρμα (offspring).