Abdullah ibn Mas’ud reported: The moon split when we were with the Prophet, peace and blessings be upon him, and it became two separate pieces. The Prophet said to us, “Bear witness. Bear witness.”
In another narration, Ibn Mas’ud said, “A piece was behind the mountain and another piece was below it.”
Source: Ṣaḥīḥ al-Bukhārī 4584, Ṣaḥīḥ Muslim 2800
Grade: Muttafaqun Alayhi (authenticity agreed upon) according to Al-Bukhari and Muslim
عَنْ عَبْدِ اللَّهِ بْنِ مَسْعُودٍ قَالَ انْشَقَّ الْقَمَرُ وَنَحْنُ مَعَ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَصَارَ فِرْقَتَيْنِ فَقَالَ لَنَا اشْهَدُوا اشْهَدُوا
وفي رواية أخرى قال ابن مسعود فَكَانَتْ فِلْقَةٌ وَرَاءَ الْجَبَلِ وَفِلْقَةٌ دُونَهُ
4584 صحيح البخاري كتاب تفسير القرآن سورة اقتربت الساعة باب وانشق القمر وإن يروا آية يعرضوا
2800 صحيح مسلم كتاب صفة القيامة والجنة والنار باب انشقاق القمر