Now a mediator is not [a mediator] of one, but God is one.
Berean Study Bible (BSB) - Galatians 3:20 >A mediator is unnecessary, however, for only one party; but God is one.
Textus Receptus (TR) - Galatians 3:20 >Ὁ δὲ μεσίτης ἑνὸς οὐκ ἔστιν, ὁ δὲ Θεὸς εἷς ἐστίν.