'Ought' in the Bible

But woe to you Pharisees! For you tithe mint and rue and every herb, but you bypass justice and the love of God. You ought to have done these, and not to have left the other undone.

The ruler of the synagogue, being indignant because Jesus had healed on the Sabbath, said to the multitude, "There are six days in which men ought to work. Therefore come on those days and be healed, and not on the Sabbath day!"

Ought not this woman, being a daughter of Abraham, whom Satan had bound eighteen long years, be freed from this bondage on the Sabbath day?"