1 Corinthians 15:9-11

Revised Standard Version Catholic Edition

⁹ For I am the least of the apostles, unfit to be called an apostle, because I persecuted the church of God. ¹⁰ But by the grace of God I am what I am, and his grace toward me was not in vain. On the contrary, I worked harder than any of them, though it was not I, but the grace of God which is with me. ¹¹ Whether then it was I or they, so we preach and so you believed.