What is that which discharges or releases from an obligation, liability, penalty, etc., as a price of ransom, a legal document. Death, who sets all free, Hath paid his ransom now and full discharge. Milton called?

discharge — That which discharges or releases from an obligation, liability, penalty, etc., as a price of ransom, a legal document. Death, who sets all free, Hath paid his ransom now and full discharge. Milton. (Webster's 1913.)