2:25 “And give glad tidings to those who believe and do righteous good deeds, that for them will be Gardens under which rivers flow. Every time they will be provided with a fruit therefrom, they will say: This is what we were provided with before, and they will be given things in resemblance and they shall have therein purified mates and they will abide therein forever”.
After mentioning the torment that Allah has prepared for His enemies, He mentions the condition of those who believe in Him. This is the reason why the Quran was called Mathani (doubles), as it mentions faith and then disbelief, or vice versa, etc.
Consequently, Allah stated that Paradise has rivers that run beneath it, meaning, underneath its trees and rooms. From Hadiths it is learned that the rivers of Paradise do not run in valleys. The banks of the Prophet’s lake in Paradise “Al-Kawthar” are made of domes of hollow pearls. Whereas, the sand of Paradise is made of scented musk, and its stones are made from pearls and jewels.
The prophet SAW said “The rivers of Paradise spring from beneath hills, or mountains of musk” [authentic].
Yahya bin Abi Kathir said the grass of Paradise is made of saffron and its hills from musk.
In Paradise, boys of everlasting youth will serve the believers with fruits which they will eat. They will then be brought similar fruits, and the people of Paradise will comment, `This is the same as what you have just brought us’. The boys will say to them: `Eat, for the color is the same, but the taste is different’. Ibn Abbas said “Nothing in Paradise resembles anything in the life of this world, except in name”.
“and they shall have therein purified mates”, means purified from filth, impurity, menstruation, urine, semen and pregnancies.
“and they will abide therein forever”, means ultimate happiness, enjoying everlasting delight, safe from death and disruption of their bliss.