10. And with the same chain of transmission, on the authority of Ibn Abu `Umayr, on the authority of Abu Ayyub al-Khazzaz, on the authority of Muhammad ibn Muslim that Abu `Abd Allah al-Sadiq said: “O Muhammad! Always use logic with the people until they start discussing the Essence of Allah. When you hear them talking about that say: There is no god but Allah, the One, and nothing whatsoever is like unto Him.”