I want to know that how can I enter in Jannatul Firdous (the Highest Volume of Jannah that a human being can obtain)?وَلَنَبْلُوَنَّكُم بِشَىْءٍۢ مِّنَ ٱلْخَوْفِ وَٱلْجُوعِ وَنَقْصٍۢ مِّنَFor people who believe geography and hydrology have established which the supply of the rivers is