1 Thessalonians 2:9

For ye remember, brethren, our labor and toil, how laboring night and day, that we might not be burdensome to any of you, we preached to you the gospel of God.

2 Thessalonians 3:8

neither did we eat any mans bread for nought, but were working with labor and travail night and day, that we might not be burdensome 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 ye remember, brethren, our labor and toil, how laboring night and day, that we might not be burdensome to any of you, we preached to you the gospel of God.
2 Thessalonians 3:8
neither did we eat any mans bread for nought, but were working with labor and travail night and day, that we might not be burdensome to any of you.