And the angel of the Lord appeared unto him in a flame of fire out of the midst of a bush: and he looked, and, behold, the bush burned with fire, and the bush was not consumed. Exodus 3:2
"Verily, this is the 'Sword of Moses' with which he accomplished his miracles and mighty deeds and destroyed all kinds of witchcraft.
It had been revealed to Moses in the bush when the great and glorious name was given to him. Take care of it and it will take care of thee. if thou approachest fire it will not burn thee, and it will preserve thee from every eveil in the world.
If thou wishest to try it, take a thich (green) branch and utter this word 'sword' over it five times at sunrise and it will dry up." The Sword of Moses, translated from the Hebrew, circa 1-4 centuries AD, British Museum.