(When we die and become dust and bones, shall we then indeed be resurrected) 56:47 They said this statement in denial and discounting Resurrection. Allah the Exalted said,
نَحْنُ خَلَقْنَـكُمْ
(We created you,) meaning, `We have created you after you were nothing. Therefore, is not that Who is able to start the creation, more able to bring it back' Allah's statement,
فَلَوْلاَ تُصَدِّقُونَ
(then why do you believe not) `why do you not then believe in Resurrection' Then Allah said, while bringing forth evidence that Resurrection occurs,
Proof of the occurrence of the Day of Resurrection
Thus far the Surah dealt with three categories of people on the Plain of Hashr (Gathering.) The verses so far described the reward and punishment of these three groups. The current set of verses warn the deviant skeptics and atheists who completely deny the Day of Judgment and life after death, or set up partners to Allah in His worship. The verses purport to tear down the curtain of negligence and ignorance that has kept man in the dark. Whatever exists, or is coming into existence at the present time, or will come into existence in the future in this cosmic world is as a result of the creative power of Allah. He brings them into existence, retains them and makes them subservient to man. The apparent causes of these events act as veils over Reality. Had these veils been removed and man is able to witness the creation of these things directly without the mediation of these apparent causes, he will be forced to believe in Allah. However, Allah has made this world a venue of test. Therefore, whatever comes into existence comes under the veils of causes.
‘Those on the Left’ (ashab ash-shimal) means those to whom is condign punishment will be meted out. Deceived by the amenities they had in this world, they had made things other than God the centre of their attention, and this is the greatest human crime. They had made themselves so forgetful of the Hereafter, it was as if it was not to become a reality at all. Such people will receive severe punishment on the Day of Judgement.
Uthmani text of the Madinah mushaf (King Fahd Complex). Translation: Saheeh International. Tafsir via Quran.com.