Overall meaning : Allah, Glorified be He, informs us about those who came after those He had blessed: But then they were succeeded by generations who neglected their prayers (by abandoning them altogether, leaving out their pillars, obligatory acts or conditions or delaying them beyond their designated times, among other things) and followed their lusts instead of obeying Allah’s commands, and so they will suffer severe punishment in Hell. Nonetheless, as for those who repent of their sins, believe in their Lord and do righteous deeds, they will be admitted into Paradise without having the reward for their good deeds diminished in the least—gardens of perpetual bliss which the All-Compassionate God has promised His believing savants, and in which they have believed without even having seen them in the life of the world. His promise will surely be fulfilled, and His believing servants will surely enter Paradise.
The Almighty then draws an image of Paradise and its dwellers in such a way as to urge us to make sufficient preparations to attain it: The dwellers of Paradise will hear no vain, idle talk in it, but only pleasant words and sounds (such as the angels’ greetings to them and their exchange of greetings of peace among one another), and they will have in it their sustenance of whatever food and drink they desire at approximately the time of the morning and the evening in the life of this world. That is Paradise which We will give Our servants who fear Our punishment by doing what We command and avoid what We forbid.