1 Corinthians 15:14, 58
1 Corinthians 15:14 ASV
and if Christ hath not been raised, then is our preaching vain, your faith also is vain.
1 Corinthians 15:58 ASV
Wherefore, my beloved brethren, be ye stedfast, unmoveable, always abounding in the work of the Lord, forasmuch as ye know that your labor is not vain in the Lord.