Musnad Abu Ya'la al-Mawsili 154:72

And by the same chain from Ibn Umar, he said: I heard the Messenger of Allah, peace and blessings of Allah be upon him, saying: "This tribe of Quraysh will remain safe until you turn them away from their religion, [which is] the equivalent of our kinship." He said: Then a man stood up to him and said: "O Messenger of Allah, am I in Paradise or in the Fire?" He said: "In Paradise." Then another stood up to him and said: "Am I in Paradise or in the Fire?" He said: "In the Fire." Then he said: "Be silent regarding me as I am silent regarding you. For were it not that you would not bury one another, I would have informed you of those among you who are of the people of the Fire, until you would distinguish them at the time of death. And if I were commanded to do so, I would have done it."