Jesus said, "Do not work for food that spoils, but for food that endures to eternal life, which the Son of Man will give you. On him God the Father has placed his seal of approval." 

John 6:27

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.

1 Corinthians 15:58

Never be lacking in zeal, but keep your spiritual fervor, serving the Lord. 

Romans 12:11

Our people must learn to devote themselves to doing what is good, in order that they may provide for daily necessities and not live unproductive lives. 

Titus 3:14

I realized that it is good and proper for a man to eat and drink, and to find satisfaction in his toilsome labor under the sun during the few days of life God has given him- for this is his lot. 

Ecclesiastes 5:18

Diligent hands bring wealth. 

Proverbs 10:4

The Desires of the diligent are fully satisfied. 

Provers 13:4

The sleep of a laborer is sweet, whether he eats little or much, but the abundance of a rich man permits him no sleep. 

Eccliesiastes 5:12

There remains, then a Sabbath-rest for the people of God; for anyone who enters God's rest also rests from his own work, just as God did from his.

Hebrews 4:9-10