Parallel
Romans 9:16
Patriarchal Greek New Testament (1904) · Berean Standard Bible
ἄρα οὖν οὐ τοῦ θέλοντος οὐδὲ τοῦ τρέχοντος, ἀλλὰ τοῦ ἐλεοῦντος Θεοῦ.
So then, it does not depend on man’s desire or effort, but on God’s mercy.