Before saying that his listeners are the light of the world, Jesus says that they are the this "of the earth.
Lyon Playfair argued that some references to this thing in the Bible should actually read "petroleum". Elisha heals the waters of Jericho using this substance. Leviticus 2:13 requires that grain offerings be accompanied by an offering of this. Second Chronicles uses it to denote the covenant by which God gives David dominion over Israel. Â According to one midrash, a sinful woman from the book of Genesis ran around to ask her sinful neighbors for this stuff so as to reveal that her husband was harboring (*) guests in their home. Matthew 5 discusses a type of this substance which "is no longer good for anything, except to be thrownÂ out and trampled underfoot."  Before saying that his listeners are the light of the world, Jesus says that they are the this "of the earth." For 10 points, looking back at the destruction of Sodom causes Lot's wife turns into a pillar of what substance? 
Lyon Playfair argued that some references to this thing in the Bible should actually read "petroleum".
salt [anti-prompt on sodium chloride, halite, etc.] 