﴿And what has made you know﴾ means: and what thing has informed you, even if you have exerted yourself in understanding, and the place of the implicit is made clear by that, so He said: ﴿What is the striking calamity﴾ means: that you do not know it because you have not experienced anything like it.

And Imam Abu Ja'far ibn al-Zubair said: When Allah, glorified and exalted is He, said: "﴿Does he not know that when the contents of the graves are turned up﴾ [Al-Adiyat: 9] ﴿And what is in the breasts is gathered﴾ [Al-Adiyat: 10]" this was a reason for him to ask: When is that? It was said: On the Day of Resurrection, the terrifying event, the dreadful situation, the severe calamity, and the Resurrection is the striking calamity. It was repeated to emphasize the greatness of its matter, as mentioned in His saying, glorified and exalted is He: ﴿What is the Day of Clarity﴾ [Al-Haaqqa: 1] ﴿And what is the Day of Clarity﴾ [Al-Haaqqa: 2] and in His saying, glorified and exalted is He: ﴿Then the sea covered them﴾ [Ta-Ha: 78]. Then He further clarified the great horror by His saying, glorified and exalted is He: ﴿On the Day when people will be like scattered moths﴾ [Al-Qari'a: 4] and the moths are those that fall into the fire from the mosquitoes, and scattered means: spread out. ﴿And the mountains will be like wool, fluffed up﴾ [Al-Qari'a: 5] and wool is dyed wool, and He specified it for preparation for spinning, as it is not dyed for anything else unlike white [for it -] it is not required in that. Then He mentioned the state of creation in weighing deeds and the fate of each group to what has been written for them and decreed - ended.