It reached Imam Malik, may Allah have mercy on him, that when Sayyiduna Umar bin Khattab, may Allah be pleased with him, intended to go to Iraq, Ka'b Ahbar said: Do not go there, O Commander of the Faithful! For in that land are nine parts out of ten of magic, and as many wicked and evil jinn are present there, and there is a disease there which is incurable.