This is your belief because someone in 7th Century said this and later his sayings were made into your scripture. You don't even have a iota of evidence that what he said was true. He just molded to his convenience what was said centuries before him and put his name on that. That is the tradition of Abrahamic religions. Even after him, more people have done that. Whatever we have is in this world, there is no other world. No Allah, no judgment, no heaven, no hell, no angels, no Satan, no jinnat. I am surprised how people stick to these superstitious beliefs in this 21st Century. Do you really think that 72 houris will serve martyrs for Allah for eternity in their heavenly mansions?