Hadith Narrated By Muhammad bin Jubair bin Mutam

that somebody came to the Prophet (SAW) and asked him: What are the worst places? The Prophet (SAW) answered: I do not know. Then Jibrael came to the Prophet (SAW) and was asked by the Prophet (SAW) what are the worst places? Jibrael (AS) said: I do not know, but I will ask my Lord. Jibrael left and was away as much as Allah wished, then came to the Prophet (SAW) and said: 0 Muhammad (SAW), you asked me what are the worst places and once I did not know I asked Allah (SWT) and He said: (These are) the markets. (This Hadith is fairly good and reported by Ahmad in his Musnad, Al-Hakim in his Mustadrak and At Tabarani in the big Mu'jam).