Matthew 13:42

And shall cast them into a furnace of fire
Not a material, but a metaphorical one; denoting the wrath of God, which shall fall upon wicked men, and abide upon them to all eternity: which is sometimes called hell fire, sometimes a lake which burns with fire and brimstone; and here a furnace of fire, expressing the vehemency and intenseness of divine wrath, which will be intolerable; in allusion either to Nebuchadnezzar's fiery furnace, or as some think, to the custom of burning persons alive in some countries; or rather, to the burning of chaff and stubble, and the stalks of any unprofitable things that grew in the field ^F6, for the heating of furnaces, and is the very language of the Jews, who used to compare hell to a furnace; so ( Genesis 15:17 ) is paraphrased by them ^F7.

``And behold the sun set, and there was darkness; and lo! Abraham saw until the seats were set, and the thrones cast down; and lo! "hell", which is prepared for the wicked in the world to come, (arwntk) , "as a furnace", which sparks and flames of fire surrounded; (hwgbd) , "in the midst of which", the wicked fell, because they rebelled against the law, in their lifetime.''

there shall be wailing and gnashing of teeth;
declaring the remorse of conscience, the tortures of mind, the sense of inexpressible pain, and punishment, the wicked shall feel; also their furious rage and black despair.