1 Corinthians 15:9-10 NIV

9 For I am the least of the apostles1 and do not even deserve to be called an apostle, because I persecuted2 the church of God.3

References for 1 Corinthians 15:9

10 But by the grace4 of God I am what I am, and his grace to me5 was not without effect. No, I worked harder than all of them6--yet not I, but the grace of God that was with me.7

References for 1 Corinthians 15:10