'Covet' in the Bible

What follows? Is the Law itself a sinful thing? No, indeed; on the contrary, unless I had been taught by the Law, I should have known nothing of sin as sin. For instance, I should not have known what covetousness is, if the Law had not repeatedly said, "Thou shalt not covet."

For the precepts, "Thou shalt not commit adultery," "Thou shalt do no murder," "Thou shalt not steal," "Thou shalt not covet," and all other precepts, are summed up in this one command, "Thou shalt love thy fellow man as much as thou lovest thyself."