11. [11/308] al-Tawhid: Ibn al-Walid from al-Saffar from Ibn Isa from Ibn Abi Umayr from Hisham b. al-Hakam who said
I said to Abi Abdillah عليه السلام: What is the proof that Allah is one? He said: the continuing regulation (of the universe) and the perfection in creation, as the Mighty and Majestic said: “if there were in them other gods apart from Allah then they (the heavens and the earth) would have fallen apart” (21:22)