The highest level of jannah is firdaws which is where the prophets , the martyrs and the most truthful and pious people will dwell. In contrast to Jannah towards Jahanam and Nar are used to refer to the concept of hell.
The descriptions of paradise are mentioned in significant detail in the Qur'an, Hadith and traditional afsīr (exegesis). Paradise is described as surrounded by eight principal gates, each level generally being divided into a hundred degrees. The highest level is known as firdaws (sometimes called Eden). It will be entered first by Muhammad, then those who lived in poverty, and then the most pious. Entrants will be greeted by angels with salutations of peace or As-Salamu Alaykum.[2]
Gardens of perpetual bliss: they shall enter there, as well as the righteous among their fathers, their spouses, and their offspring: and angels shall enter unto them from every gate (with the salutation):
"Peace unto you for that ye persevered in patience! Now how excellent is the final home!"
—Qur'an, Surah 13 (a-Raʾd), Ayat 23-24[3] By Hanan Ahmed