According to search-discovered classical Islamic scholarship, the event of 'Ar-Rajj' (the severe shaking) described in Quran 56:4 is the cataclysmic convulsion of the Earth that signals the commencement of the Day of Judgment. Tafsir authorities like Ibn Kathir explain that this is not a natural earthquake but a direct command from Allah that will violently agitate the entire planet, causing mountains to crumble into dust. Al-Tabari and Al-Qurtubi emphasize the linguistic intensity of the Arabic root ر-ج-ج (r-j-j), meaning 'to be in violent commotion,' highlighting that the Quranic phrasing signifies an absolute and final upheaval. This event serves as an ultimate manifestation of divine power, dismantling the physical world to establish the new reality of the Hereafter and the Final Reckoning. The scholarly consensus confirms Ar-Rajj as a literal, foundational event in Islamic eschatology, serving as the divine prelude to resurrection and judgment.