Surah Al-Qamar 54:1

ٱقْتَرَبَتِ ٱلسَّاعَةُ وَٱنشَقَّ ٱلْقَمَرُ

The Hour has come near, and the moon has split [in two].

Translation: Saheeh International

Tafsir

The Hour has drawn near the Resurrection is close at hand and the moon has split it broke in two at Mount Abū Qubays and Qu‘ayqa‘ān as a sign for the Prophet s for it had been demanded of him and when it took place he said ‘Bear witness now!’ — as reported by the two Shaykhs al-Bukhārī and Muslim.

Excerpt from Tafsir al-Jalalayn, commentary on 54:1, via Quran.com. The reader has the full commentary and 9 more tafsirs.