Are there clear proofs from the Quran and Sunnah for the principle "Recompense in Paradise is of the same kind as the deed," and based on this, will one who drinks alcohol or commits fornication in this world be deprived of things related to these acts in Paradise, or is this a matter of the unseen?

The principle "recompense is of the same nature as the deed" encompasses both good and evil in this world and the hereafter, and there is abundant evidence for it in the Quran and Sunnah.

Examples include: "Whoever fulfills the need of his brother, Allah will fulfill his need." "Whoever relieves a Muslim of a distress, Allah will relieve him of a distress from the distresses of the Day of Resurrection." "Whoever covers a Muslim, Allah will cover him on the Day of Resurrection." "Whoever feeds a believer, or gives him drink, or clothes him, Allah will feed him from the fruits of Paradise, or give him drink from the sealed nectar, or clothe him from the green garments of Paradise." "Whoever has two wives and inclines to one of them, will come on the Day of Resurrection with his side leaning."

As for the one who drinks alcohol in this world and does not repent, he will be deprived of the wine of the Hereafter. This is not an application of the principle "recompense is of the same nature as the deed," but rather a punishment by its opposite.

There is no evidence for the deprivation of the fornicator from the houris, but the fornicator may be recompensed according to the nature of his deed in this world.