During the lifetime of Messenger of Allah ﷺ the moon was split into two parts; one part remained over the mountain, and the other part went beyond the mountain. On that, Messenger of Allah ﷺ said, "Witness this miracle."
انْشَقَّ الْقَمَرُ عَلَى عَهْدِ رَسُولِ اللَّهِ ﷺ فِرْقَتَيْنِ فِرْقَةً فَوْقَ الْجَبَلِ وَفِرْقَةً دُونَهُ فَقَالَ رَسُولُ اللَّهِ ﷺ اشْهَدُوا