'Furnace' in the Bible

But if God so clothes the grass of the field, which is alive and green today and tomorrow is [cut and] thrown [as fuel] into the furnace, will He not much more clothe you? You of little faith!

and will throw them into the furnace of fire; in that place there will be weeping [over sorrow and pain] and grinding of teeth [over distress and anger].

and throw the wicked into the furnace of fire; in that place there will be weeping [over sorrow and pain] and grinding of teeth [over distress and anger].