Surah Al-Qari'ah 101:3

وَمَآ أَدْرَىٰكَ مَا ٱلْقَارِعَةُ

And what can make you know what is the Striking Calamity?

Translation: Saheeh International

Tafsir

And what will show you what will make known to you what the Clattering Blow is? — additional emphasis of its awesomeness the first mā is a subject and what follows it is its predicate; the second mā and its predicate also function together as the second direct object of the verb adrā ‘show’.

Excerpt from Tafsir al-Jalalayn, commentary on 101:3, via Quran.com. The reader has the full commentary and 9 more tafsirs.