Sunan Ibn Majah 4331

Mu’adh bin Jabal said:“I heard the Messenger of Allah (ﷺ) say: ‘Paradise has one hundred grades, each of which is as big as the distance between heaven and earth. The highest of them is Firdaws and the best of them is Firdaws. The Throne is above Firdaws and from it spring forth the rivers of Paradise. If you ask of Allah, ask Him for Firdaws.’”