Bible Verses About Reciprocity

Yes, it has been their good pleasure, and they are their debtors. For if the Gentiles have been made partakers of their spiritual things, they owe it to them also to serve them in fleshly things.

If we sowed to you spiritual things, is it a great thing if we reap your fleshly things?

But let him who is taught in the word share all good things with him who teaches.