Sahih al-Bukhari, Volume 6, Book 60, Hadith 391 (USC-MSA) ⓘ
Narrated Anas: The moon was cleft asunder into two parts.
حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا يَحْيَى، عَنْ شُعْبَةَ، عَنْ قَتَادَةَ، عَنْ أَنَسٍ، قَالَ انْشَقَّ الْقَمَرُ فِرْقَتَيْنِ.
also referenced under: Book 65, Hadith 4868 (In-Book) & Hadith 4868 (DarusSalam)