[1563/2] al-Kafi: Ali b. Ibrahim from his father from Ibn Abi Umayr from Umar b. Udhayna from al-Fudhayl b. Yasar who said: I said to Abi Abdillah عليه السلام: The people say that the Qur’an came down upon seven Ahruf? So he (i.e. the Imam) said: The enemies of Allah have lied! Rather it came down upon one Harf from the One