2 Corinthians 3:5

5Notοὐχthatὅτιfromἀφ’ourselvesἑαυτῶνsufficientἱκανοίwe areἐσμενto reckonλογίσασθαίanythingτιasὡςofἐξourselvesαὑτῶν,butἀλλ’theἡsufficiencyἱκανότηςof usἡμῶν[is] ofἐκτοῦGodθεοῦ,

Not that we are sufficient from ourselves to reckon anything as of ourselves, but our sufficiency [is] of God,