(And on the Day when the Hour will be established, the criminals will be plunged into destruction with despair.) Ibn `Abbas said, "The sinners will be filled with despair." Mujahid said, "The sinners will be exposed;" according to another report he said, "The sinners will grieve."
فَهُمْ فِي رَوْضَةٍ يُحْبَرُونَ (They will be in a garden, extremely delighted - 30:15). Yuhbarun (يُحْبَرُونَ ) is derived from hubur, (حَبُور)which means happiness, joy, or delight. This word encompasses all types of delight, which the dwellers of paradise will draw from the bounties of Paradise. The Holy Qur'an has not specified this, and has rather kept it generalized. At another place it is said فَلَا تَعْلَمُ نَفْسٌ مَّا أُخْفِيَ لَهُم مِّن قُرَّةِ أَعْيُنٍ (32:17) that is, ` no one knows in this world what delight and joy is in store for them (the people of Paradise) in Paradise'. While explaining this verse some commentators have mentioned various delightful things, which all fall under the category of joy and delight.
Tazkirul Quran
Maulana Wahiduddin KhanOn ayahs 10–17
Constant remembrance (through prayer, etc.) and deep contemplation lead a man towards finding God. It is by profound thought that a man finds God. In the present world, God has scattered His signs everywhere—in the human environment, in the surrounding universe and also in the teachings of the Prophet. Those who give serious consideration to these signs of God will find God. Argument in favour of God is God’s representative on earth. If rightful argument is presented to a man and he ignores it, it is as if he has ignored God Himself. For such people there is nothing before God except eternal deprivation.
Uthmani text of the Madinah mushaf (King Fahd Complex). Translation: Saheeh International. Tafsir via Quran.com.