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

14 I am debtor both to the Greeks, and to the Barbarians; both to the wise, and to the unwise.

12 Therefore, brethren, we are debtors, not to the flesh, to live after the flesh.

27 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.