1 Thessalonians 2:9

for you remember, my brethren, our labour and toil: how we worked day and night, that in preaching the gospel of God, we might not be chargeable to any of you.

2 Thessalonians 3:8

that we did not eat any man's bread for nothing: but with toil and fatigue work'd night and day to avoid being chargeable 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, my brethren, our labour and toil: how we worked day and night, that in preaching the gospel of God, we might not be chargeable to any of you.
2 Thessalonians 3:8
that we did not eat any man's bread for nothing: but with toil and fatigue work'd night and day to avoid being chargeable to any of you: