Romans 15:27

For they thought it was a good idea, and [besides] they were indebted to those Jewish Christians. For if the Gentiles [have] shared in the spiritual blessings of the Jews, [then] they owe it to those Jews to help meet their material needs.

1 Corinthians 9:11

If we have planted spiritual seeds [i.e., the Gospel message] among you, is it too much to expect to reap a material harvest from you?

Galatians 6:6

But the person who is taught the word [of God] should provide his teacher with what he needs.

Romans 11:17

But some of the branches [of a cultivated olive tree] were broken off [i.e., God's rejection of the Jews] and you [Gentiles], representing a wild olive tree [branch], were grafted into it. So then, you [Gentiles] were able to benefit from the roots and sap of the olive tree, along with the Jews.

Treasury of Scripture Knowledge

Summary

It hath pleased them verily; and their debtors they are. For if the Gentiles have been made partakers of their spiritual things, their duty is also to minister unto them in carnal things.

General references

Bible References

And

Romans 11:17
But some of the branches [of a cultivated olive tree] were broken off [i.e., God's rejection of the Jews] and you [Gentiles], representing a wild olive tree [branch], were grafted into it. So then, you [Gentiles] were able to benefit from the roots and sap of the olive tree, along with the Jews.
1 Corinthians 9:11
If we have planted spiritual seeds [i.e., the Gospel message] among you, is it too much to expect to reap a material harvest from you?
Galatians 6:6
But the person who is taught the word [of God] should provide his teacher with what he needs.
Philemon 1:19
I, Paul, am writing this in my own handwriting: I will pay you back. [But] I will not mention that you owe me your own self, as well.

General references

Romans 15:25
But for now, I am on my way to Jerusalem to minister to [the needs of] God's holy people there.
Galatians 6:6
But the person who is taught the word [of God] should provide his teacher with what he needs.