2 Corinthians 8:3

3Forὅτιaccording toκατὰ[their] abilityδύναμιν,I testify [that]μαρτυρῶ,andκαὶbeyondπαρὰ[their] abilityδύναμιν,[they were] willing of themselvesαὐθαίρετοι

For I testify [that] according to [their] power and beyond [their] power, of their own accord,