"In the infamous book Toldoth Jeschu […] it is related that in the house of the Sanctuary there was a stone which the Patriarch Jacob anointed with oil. On this stone were carved the tetragrammatic letters of the Name (IHVH), and if anyone could learn them he could destroy the world. They therefore decreed that no one must learn them, and they placed two dogs upon two iron columns before the Sanctuary so that if anyone should learn them the dogs would bark at him coming out and he would forget the letters through fear. Then it is related: "Jesus came and entered, learned the letters and wrote them down on parchment. Then he cut into the flesh of his thigh and inserted them there, and having pronounced the name, the wound healed.""