1 Corinthians 15:10

But by God's unmerited favor I have become what I am, and His unmerited favor shown to me was not bestowed for nothing, for I have toiled more extensively than any of them, and yet it was not I but God's unmerited favor working with me.

1 Corinthians 15:58

So, my dear brothers, continue to be firm, incapable of being moved, always letting the cup run over in the work of the Lord, because you know that your labor in the service of the Lord is never thrown away.

Galatians 6:9

Let us stop getting tired of doing good, for at the proper time we shall reap if we do not give up.

Colossians 1:29

For this I am toiling and struggling by His active energy which is mightily working in 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 by God's unmerited favor I have become what I am, and His unmerited favor shown to me was not bestowed for nothing, for I have toiled more extensively than any of them, and yet it was not I but God's unmerited favor working with me.
Galatians 6:9
Let us stop getting tired of doing good, for at the proper time we shall reap if we do not give up.
Colossians 1:29
For this I am toiling and struggling by His active energy which is mightily working in me.

General references

1 Corinthians 12:21
The eye cannot say to the hand, "I do not need you," or the hand to the feet, "I do not need you."
1 Corinthians 14:8
Again, indeed, if the bugle does not sound a call distinct and clear, who will prepare for battle?