 If the citizen's heart was heavier than a feather they would be devoured by Ammit.Zoroastrianism developed an eschatological concept of a Last Judgment called Frashokereti where the dead will be raised and the righteous wade through a river of milk while the wicked will be burned in a river of molten metal.Abrahamic religions such as Christianity have similar concepts of believers facing judgement on a last day to determine if they will spend eternity in Gehenna or heaven for their sin .