Surah Az-Zalzalah 99:1

إِذَا زُلْزِلَتِ ٱلْأَرْضُ زِلْزَالَهَا

When the earth is shaken with its [final] earthquake

Translation: Saheeh International

Tafsir

When earth is shaken when it is rocked for the rising of the Hour with its final quake with its most violent rocking one that befits its magnitude

Excerpt from Tafsir al-Jalalayn, commentary on 99:1, via Quran.com. The reader has the full commentary and 9 more tafsirs.