'Abdullah b. Mas'ud reported that the moon was split up in two parts during the lifetime of Messenger of Allah ﷺ. The mountain covered one of its parts and one part of it was above the mountain and Messenger of Allah ﷺ said: Bear witness to this.

حَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ مُعَاذٍ الْعَنْبَرِيُّ، حَدَّثَنَا أَبِي، حَدَّثَنَا شُعْبَةُ، عَنِ الأَعْمَشِ، عَنْ
إِبْرَاهِيمَ، عَنْ أَبِي مَعْمَرٍ، عَنْ عَبْدِ اللَّهِ بْنِ مَسْعُودٍ، قَالَ انْشَقَّ الْقَمَرُ عَلَى عَهْدِ رَسُولِ اللَّهِ
ﷺ فِلْقَتَيْنِ فَسَتَرَ الْجَبَلُ فِلْقَةً وَكَانَتْ فِلْقَةٌ فَوْقَ الْجَبَلِ فَقَالَ رَسُولُ اللَّهِ
ﷺ
" اللَّهُمَّ اشْهَدْ " .