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 which was bestowed upon me was not in vain; but I laboured more abundantly than they all: yet not I, but the grace of God which was with me.

1 Corinthians 15:14

14 And if Christ be not risen, then is our preaching vain, and your faith is also vain.

1 Corinthians 15:58

58 Therefore, my beloved brethren, be ye stedfast, unmoveable, always abounding in the work of the Lord, forasmuch as ye know that your labour is not in vain in the Lord.