Muhammad b. al-Hasan b. Ahmad b. al-Walid narrated to us. He said: Muhammad b. al-Hasan al-Saffar narrated to us. He said: Ahmad b. Abi `Abdillah al-Barqi narrated to me. He said: My father narrated to me from Safwan b. Yahya from Abi’l Yasa` from Sulayman b. Khalid. He said: Abu `Abdillah said:

Beware of contemplating about [the essence of] Allah, for contemplation about Allah only increases in deviation. Surely, Allah cannot be comprehended by sights, and He cannot be described by measurement.