For if the inheritance [be] of the law, [it is] no more of promise: but God gave [it] to Abraham by promise.
Berean Study Bible (BSB) - Galatians 3:18 >For if the inheritance depends on the law, then it no longer depends on a promise; but God freely granted it to Abraham through a promise.
Textus Receptus (TR) - Galatians 3:18 >Εἰ γὰρ ἐκ νόμου ἡ κληρονομία, οὐκέτι ἐξ ἐπαγγελίας· τῷ δὲ Ἀβραὰμ δι᾿ ἐπαγγελίας κεχάρισται ὁ Θεός.