1 Thessalonians 2:9

For you remember our labor and toil, brethren; we worked night and day, that we might not be a burden to any of you, while we preached to you the gospel of God.

2 Thessalonians 3:8

nor did we eat anyone's bread without paying for it, but with labor and hardship we worked night and day so that we would not be a burden to any of you.

Treasury of Scripture Knowledge

Summary

I have seen the travail, which God hath given to the sons of men to be exercised in it.

Bible References

General references

1 Thessalonians 2:9
For you remember our labor and toil, brethren; we worked night and day, that we might not be a burden to any of you, while we preached to you the gospel of God.
2 Thessalonians 3:8
nor did we eat anyone's bread without paying for it, but with labor and hardship we worked night and day so that we would not be a burden to any of you.