1 Corinthians 15:10

But what I am I am by the grace of God, and His grace bestowed upon me did not prove ineffectual. But I labored more strenuously than all the rest--yet it was not I, but God's grace working with me.

1 Corinthians 15:58

Therefore, my dear brethren, be firm, unmovable, busily occupied at all times in the Lord's work, knowing that your toil is not fruitless in the Lord.

Galatians 6:9

Let us not abate our courage in doing what is right; for in due time we shall reap a reward, if we do not faint.

Colossians 1:29

To this end, like an earnest wrestler, I exert all my strength in reliance upon the power of Him who is mightily at work within me.

Treasury of Scripture Knowledge

Summary

So we laboured in the work: and half of them held the spears from the rising of the morning till the stars appeared.

Bible References

So we

1 Corinthians 15:10
But what I am I am by the grace of God, and His grace bestowed upon me did not prove ineffectual. But I labored more strenuously than all the rest--yet it was not I, but God's grace working with me.
Galatians 6:9
Let us not abate our courage in doing what is right; for in due time we shall reap a reward, if we do not faint.
Colossians 1:29
To this end, like an earnest wrestler, I exert all my strength in reliance upon the power of Him who is mightily at work within me.

General references

1 Corinthians 12:21
It is also impossible for the eye to say to the hand, "I do not need you;" or again for the head to say to the feet, "I do not need you."
1 Corinthians 14:8
If the bugle--to take another example--gives an uncertain sound, who will prepare for battle?