Neither, because they are the seed of Abraham, are they all children: but, In Isaac shall thy seed be called.
Nor because they are his descendants are they all Abraham's children. On the contrary, It is through Isaac that your offspring will be reckoned.
οὐδ' ὅτι εἰσὶν σπέρμα Ἀβραάμ, πάντες τέκνα· ἀλλ' Ἐν Ἰσαὰκ κληθήσεταί σοι σπέρμα.
oyd' oti eisin sperma Abraam, pantes tekna· all' En Isaak klēthēsetai soi sperma.