Sahih al-Bukhari 6362

Qatada related that Anas said, "They asked the Messenger of Allah, may Allah bless him and grant him peace, until they asked him so many questions that he became angry and went up on the minbar and said, 'If you ask me about anything today I will make it clear to you.' I began to look right and left and every man had covered his head in his garment and was weeping. There was a man who, when he quarrelled with people, used to be called by other than his father's name. He said, 'Messenger of Allah, who is my father?' "Hudhafa," he replied. Then 'Umar got up and said, 'We are pleased with Lord as our Lord, Islam as our deen, and Muhammad as a Messenger. We seek refuge with Allah from afflictions.' The Messenger of Allah, may Allah bless him and grant him peace, said, 'I have never seen a day like today in good and evil. The Garden and the Fire were made to appear before me so that I saw them just beyond this wall.'" When Qatada mentioned this hadith, he would mention this ayat: "O you who believe! Do not ask about matters which, if they were made known to you, would make things difficult for you." (5:101)