John 6:27
Labor not for the food that perisheth, but for the food that endureth to everlasting life, which the Son of man giveth to you; for on him hath the Father set his seal, even God.
1 Corinthians 15:58
Therefore, my beloved brethren, be steadfast, immovable, always abounding in the work of the Lord, since ye know that your labor is not in vain in the Lord.
Hebrews 6:11-12
But we earnestly desire that every one of you may show the same diligence with regard to the full assurance of your hope even to the end;
2 Peter 1:5-10
even for this very reason, giving all diligence, add to your faith virtue, and to virtue knowledge,