While he was on the pulpit, "People, opinion was only correct when it came from the Messenger of Allah ﷺ, because Allah used to show him the truth. As for us, it is merely conjecture and effort."
حدثنا سليمان بن داود المهري أخبرنا ابن وهب عن يونس بن يزيد عن ابن شهاب أن
وهو على المنبر يا أيها الناس إن الرأي إنما كان من رسول الله ﷺ مصيبا لأن الله كان يريه وإنما هو منا الظن والتكلف
No references are available.
[Its chain is daif] Abu Dawud alone narrated it. Munziri said, this is disconnected, Zuhri did not meet Umar.