Prohibition on Speaking without Knowledge and Ruling based on Opinion

3. [3/37] al-Kafi: And from a number from Ahmad b. Muhammad b. Khalid from al-Hasan b. Ali al-Washsha from Aban al-Ahmar from Ziyad b. Abi Raja from Abi Ja’far عليه السلام who said: say what you know and if you do not know then say: “Allāh is more knowing”, a man selectively picks out a verse from the Qur’an and falls in it (misinterpreting it) a farther distance than what is between the earth and the sky.