Surah 18. Al-Kahf, Ayah 107

 Al-Firdaws, the highest place in Paradise.

Firdaus in Persian means an enclosed place, a park. In technical theological language the word is used for the inner circle of Heaven, or the highest Heaven, the destination of those who perfectly fulfil both requirements, viz.; a sound faith, and perfectly righteous conduct. Small faults in either respect are forgiven; the Mercy of Allah steps in.