Midrasch zu Ijow 31:12

What did the Holy One, blessed be He, do? He put His name (יה) between their (names), saying: If they go in My ways || and keep all My precepts, behold My name is given to them, it will deliver them from all distress. If they do not (walk in My ways), behold I will take away My name from their (names), and they will become êsh (fire). And fire consumes fire, as it is said, "For it is a fire that consumeth unto destruction" (Job 31:12).