'Obligation' in the Bible

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

Now to someone who works, wages are not considered a gift but an obligation.

Consequently, brothers, we are not with respect to human nature, that is under an obligation to live according to human nature.

Now we who are strong have an obligation to bear the weaknesses of those without strength, and not to please ourselves.

Yes, they have kindly done this, and, in fact, it was a debt they owed them. For seeing that the Gentiles have been admitted in to partnership with the Jews in their spiritual blessings, they in turn are under an obligation to render sacred service to the Jews in temporal things.