Surah 77. Al-Mursalat

22As this world has been used here in contrast to the "deniers'; the righteous here implies the people who refrained from denying the Hereafter and accepted it and passed their life in the world with the belief that in 'the Hereafter they would have to render an account of their word and deed and their conduct and character.

23Here this sentence means that one of their afflictions. as mentioned above, will be that they will be standing as culprits in the plain of Resurrection, their crimes will have been proved and established openly and they will not be in a position even to open their mouths to put forward a plea in self defense, and shall ultimately become fuel of Hell. Their other affliction, and by far the worse will be that they will see the same believers enjoying themselves in Paradise, whom they had been opposing and resisting and mocking throughout their lives as foolish, narrow-minded, mean and old fashioned people.