Fornication over halal… 

“Then I saw another people: to one side there was a spread of the choicest foods anyone could dream of, to the other there was some dreadfully smelling, rotten meat. These people never looked or turned to the delicious foods, but ate only of the carrion meat. ‘Who are they?’ I asked. ‘They are men and women of your nation who engaged in all manner of unlawful sexual activities, while lawful spouses were available to them.’

Prophet Muhammad (SA) on Isra Miraj

http://www.muhammadanreality.com/ascentionmiraj.htm