This tiered concept of Heaven in Islamic theology posits that Jannah is enriched by varying degrees of spiritual fulfilment, with Firdaus standing supreme. "Whoever seeks a method other than Islam, it won't ever be approved from them, and inside the Hereafter They are going to be Among the many losers." https://garrettinkib.tribunablog.com/the-best-side-of-jannah-firdaus-44693502