1 Corinthians 15:2, 58
1 Corinthians 15:2 NCV
And you are being saved by it if you continue believing what I told you. If you do not, then you believed for nothing.
1 Corinthians 15:58 NCV
So my dear brothers and sisters, stand strong. Do not let anything move you. Always give yourselves fully to the work of the Lord, because you know that your work in the Lord is never wasted.