Surah 55. Ar-Rahman, Ayah 64

I.e., by reason of abundant watering (Taj al-'Arus). It is to be noted that the adjective "green" is often used in the Qur'an to indicate ever-fresh life: e.g., the "green garments" which the inmates of paradise will wear ( 18:31 and 6:21 ), or the "green meadows" upon which they will recline (cf. verse {76} of he present surah).

"Dark-green in colour": these Gardens will also be fruitful and flourishing, and watered plentifully; but their aspect and characteristics will be different, corresponding to the subjective differences in the ideas of Bliss among those who would respectively enjoy, the two sets of Gardens.