1 Corinthians 9:18

What then is my reward? [Just this:] that, when I preach the gospel, I may offer the gospel without charge [to everyone], so as not to take advantage of my rights [as a preacher and apostle] in [preaching] the gospel.

1 Corinthians 7:31

and those who use the world [taking advantage of its opportunities], as though they did not make full use of it. For the outward form of this world [its present social and material nature] is passing away.

Romans 14:15

If your brother is being hurt or offended because of food [that you insist on eating], you are no longer walking in love [toward him]. Do not let what you eat destroy and spiritually harm one for whom Christ died.

1 Corinthians 8:9

Only be careful that this liberty of yours [this power to choose] does not somehow become a stumbling block [that is, a temptation to sin] to the weak [in conscience].

1 Corinthians 9:6-7

Or is it only Barnabas and I who have no right to stop doing manual labor [in order to support our ministry]?

1 Corinthians 10:33

just as I please everyone in all things [as much as possible adapting myself to the interests of others], not seeking my own benefit but that of the many, so that they [will be open to the message of salvation and] may be saved.

2 Corinthians 4:5

For we do not preach ourselves, but Jesus Christ as Lord, and ourselves [merely] as your bond-servants for Jesus’ sake.

2 Corinthians 11:7-9

Or did I [perhaps] sin by humbling myself so that you might be exalted and honored, because I preached God’s gospel to you free of charge?

2 Corinthians 12:13-18

For in what respect were you treated as inferior to the rest of the churches, except [for the fact] that I did not burden you [with my financial support]? Forgive me [for doing you] this injustice!

1 Thessalonians 2:6

nor did we seek glory and honor from people, neither from you nor from anyone else, though as apostles of Christ we had the power to assert our authority.

2 Thessalonians 3:8-9

nor did we eat anyone’s bread without paying for it, but with labor and hardship we worked night and day [to pay our own way] so that we would not be a financial burden on any of you [for our support];

Treasury of Scripture Knowledge

Summary

What is my reward then? Verily that, when I preach the gospel, I may make the gospel of Christ without charge, that I abuse not my power in the gospel.

General references

Bible References

When

1 Corinthians 9:6
Or is it only Barnabas and I who have no right to stop doing manual labor [in order to support our ministry]?
1 Corinthians 10:33
just as I please everyone in all things [as much as possible adapting myself to the interests of others], not seeking my own benefit but that of the many, so that they [will be open to the message of salvation and] may be saved.
2 Corinthians 4:5
For we do not preach ourselves, but Jesus Christ as Lord, and ourselves [merely] as your bond-servants for Jesus’ sake.
2 Corinthians 11:7
Or did I [perhaps] sin by humbling myself so that you might be exalted and honored, because I preached God’s gospel to you free of charge?
2 Corinthians 12:13
For in what respect were you treated as inferior to the rest of the churches, except [for the fact] that I did not burden you [with my financial support]? Forgive me [for doing you] this injustice!
1 Thessalonians 2:6
nor did we seek glory and honor from people, neither from you nor from anyone else, though as apostles of Christ we had the power to assert our authority.
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 [to pay our own way] so that we would not be a financial burden on any of you [for our support];

That i

1 Corinthians 7:31
and those who use the world [taking advantage of its opportunities], as though they did not make full use of it. For the outward form of this world [its present social and material nature] is passing away.
1 Corinthians 8:9
Only be careful that this liberty of yours [this power to choose] does not somehow become a stumbling block [that is, a temptation to sin] to the weak [in conscience].
Romans 14:15
If your brother is being hurt or offended because of food [that you insist on eating], you are no longer walking in love [toward him]. Do not let what you eat destroy and spiritually harm one for whom Christ died.

General references

Acts 20:33
I had no desire for anyone’s silver or gold or [expensive] clothes.