Witchcraft has only one possible conqueror: the ground, the earth. God decreed that the ground would be the only force able to wipe out any power or deity that broke the Natural Laws.
This was decreed when a powerful witch of Heaven, Eye To Yu Oke To Ku Orun, had become bound to the ruin of the earthly deities because of her evil conduct in the world. Oshé Sá (Osemolura) took charge of bringing the progenitor of the witches into the world, since none of the others agreed. The oath that Orisha Nlá demanded of the witches was sworn on the ground.
With that oath they were forbidden to take human lives without cause. Therefore they cannot harm the genuine children of God, nor those who follow Orunmila with devotion.
The Elders of the Night, as the witches are called, received their power from Almighty God at the time when he lived freely, in his body, among the deities. Only to them was it entrusted to keep watch while God took his bath, shortly before the crowing of the rooster, since nobody was allowed to see him unclothed. This authority belonged to the witch deity alone, and at times it was she who let the rooster know that the bath was over.
Two notes accompany the text. One states that Oshé Sá shows how God shelters us against witchcraft. The other explains that witches punish whoever deserves it: there was a time when humans and witches lived as equals, and the humans allowed a witch's child to be devoured; from that day the witches resolved to put an end to the children of the earth.