'Debt' in the Bible

'When thou liftest up on thy brother a debt of anything, thou dost not go in unto his house to obtain his pledge;

and the lord of that servant having been moved with compassion did release him, and the debt he forgave him.

then having called him, his lord saith to him, Evil servant! all that debt I did forgive thee, seeing thou didst call upon me,

and to him who is working, the reward is not reckoned of grace, but of debt;