'Ought' in the Bible

"Let it be so on this occasion," Jesus replied; "for so we ought to fulfil every religious duty." Then he consented;

ought not you also to have had pity on your fellow servant, just as I had pity on you?'

"Alas for you, Scribes and Pharisees, hypocrites, for you pay the tithe on mint, dill, and cumin, while you have neglected the weightier requirements of the Law--just judgement, mercy, and faithful dealing. These things you ought to have done, and yet you ought not to have left the others undone.