Romans 1:14; Romans 8:12; Romans 15:27

Romans 1:14

14 I am under obligation both to Greeks and to barbarians, both to the wise and to the foolish.

Romans 8:12

12 So then, brethren, we are under obligation, not to the flesh, to live according to the flesh -

Romans 15:27

27 Yes, they were pleased to do so, and they are indebted to them. For if the Gentiles have shared in their spiritual things, they are indebted to minister to them also in material things.