1 Corinthians 15:14, 58
1 Corinthians 15:14 NIV
And if Christ has not been raised, our preaching is useless and so is your faith.
1 Corinthians 15:58 NIV
Therefore, my dear brothers and sisters, stand firm. Let nothing move you. Always give yourselves fully to the work of the Lord, because you know that your labor in the Lord is not in vain.