1. Zalzalah means to shake violently over and over again. Thus, zulzilat-il ardu means that the earth will be shaken violently by convulsion after convulsion, and since shaking of the earth has been mentioned, it automatically gives the meaning that the entire earth will be shaken and not a limited territory of it. Then, in order to express the great intensity of the earthquake the word zilzalaha has been added, which literally means: its being shaken. It means: It will be so shaken as a huge sphere like it ought to be shaken, or shaken to its utmost intensity. Some commentators have taken it to imply the first earthquake with which the first stage of Resurrection will begin, i.e. when all living beings will perish and the present order of the world will be upset. But, according to a large section of them, it implies the earthquake with which the second stage of Resurrection will begin, i.e. when all the former and the latter generations of mankind will rise back to life. This second commentary seems to be more correct, for the whole subsequent theme supports it.
2. This same has been expressed in Surah Al-Inshiqaq, Ayat 4, thus: And throws out whatever is within it, and becomes empty. It has several meanings:
(1) It will cast out bodies of the dead in whatever form and state and wherever they may be lying in the earth; and the following sentence indicates that at that time all the scattered parts of the bodies will reassemble and be resurrected once again in the same form and shape as they had been in their first life, for if it were not so, how will they say: What has happened to the earth? It will not only cast out the dead bodies of men but also all traces and evidences of the words, deeds and activities of their former life lying buried in it; the following sentence points out that the earth will narrate all that had happened on its back.
(2) A third meaning has also been given by some commentators, saying that it will cast out the treasures of gold, silver, jewels and every kind of wealth lying hidden in the earth’s belly and man will see it and realize how he thirsted for these things in the world, how he committed murders, thefts, robberies and piracies in the land and sea, usurped the rights of others, waged wars and devastated vast populations. On that Day all that will lie heaped up before him, yet of no avail, but will rather become a means of punishment for him.
3. Man here may as well imply every man, for after resurrection and coming to senses the first impression of every man will be as to what was happening around him; afterwards he will realize that it was the Resurrection Day. Man may also imply the man who denies the Hereafter, for what he regarded as impossible would be happening in front of him and causing him confusion and bewilderment. As for the believers, they will not be bewildered and confused, for everything would be taking place according to their belief and conviction. To an extent, this second meaning is supported by verse 52 of Surah YaSeen, in which it has been said that the deniers of the Hereafter at that time will exclaim: Ah, who has roused us from our sleeping place? And the reply given would be: This is the same which the Merciful God had promised and the Messengers sent by God had spoken the truth. This verse does not expressly say that this answer to the disbelievers would actually be given by the believers, for there is no indication of it in the verse. The probability, however, is that the believers will give them this answer.