'Discharged' in the Bible

So Amaziah dismissed the troops that came to him from Ephraim, to go home. So their anger was kindled and burned greatly against Judah, and they returned home in the heat of anger.

For the married woman [as an example] is bound and remains bound by law to her husband while he lives; but if her husband dies, she is released and exempt from the law concerning her husband.

But now we have been released from the Law and its penalty, having died [through Christ] to that by which we were held captive, so that we serve [God] in the newness of the Spirit and not in the oldness of the letter [of the Law].