For if Abraham were justified by works, he hath whereof to glory; but not before God.
If, in fact, Abraham was justified by works, he had something to boast about — but not before God.
Εἰ γὰρ Ἀβραὰμ ἐξ ἔργων ἐδικαιώθη, ἔχει καύχημα, ἀλλ' οὐ πρὸς τὸν Θεόν.
Ei gar Abraam ex ergōn edikaiōthē, echei kaychēma, all' oy pros ton Theon.