Moishe, a medieval Jewish astrologer, prophesied that the king’s favourite horse would soon die. Sure enough, the horse died a short time later. The king was outraged at the astrologer, certain that his prophecy had brought about the horse’s death. He summoned Moishe and commanded him, "Prophet, tell me when you will die!"
Moishe realized that the king was planning to kill him immediately no matter what answer he gave, so he had to answer carefully. "I do not know when I will die," he answered finally. "I only know that whenever I die, the king will die three days later."