The seventh behest is this: ‘Thou shalt do no theft.’ This behest
forbids us to take and withhold other men’s thing, whatever it be, from
wicked cause, against the will of him that owns it.
In this behest is forbidden robbery, theft, stealing, and usury, and
unfair dealing with others, in order to have for his own. And he that
acts against this behest is bound to give up what he has wrongly of
other men’s, if he knows to whom. And if he knows not, he is bound to
give it for God’s love, or to act by the advice of holy Church. And he
that wrongly withholds other men’s thing for a sinful reason sins
deadly, unless he give it up, where he owes, if he knows it and can do
it, or unless he acts by the advice of holy Church.