'Example' in the Bible

For example, a married woman is legally bound to her husband while he lives. But if her husband dies, she is released from the law regarding the husband.

What should we say then? Is the law sin? Absolutely not! On the contrary, I would not have known sin if it were not for the law. For example, I would not have known what it is to covet if the law had not said, Do not covet.