1 Corinthians 15:10; 1 Corinthians 15:14; 1 Corinthians 15:58

1 Corinthians 15:10

10 But by the grace of God I am what I am, and His grace toward me did not prove vain; but I labored even more than all of them, yet not I, but the grace of God with me.

1 Corinthians 15:14

14 and if Christ has not been raised, then our preaching is vain, your faith also is vain.

1 Corinthians 15:58

58 Therefore, my beloved brethren, be steadfast, immovable, always abounding in the work of the Lord , knowing that your toil is not in vain in the Lord .