Chapter 12: Split
Mohammed (SAW) kept trying to teach the people of Makkah. Many of the Quraysh did not believe Mohammed (SAW) was sent by Allah. One night, the sky was clear with a bright full moon.
The Quraysh came to Mohammed (SAW) and said, if he could split that Moon in the night sky, they would believe He was a messenger of Allah. Many people were there.
Mohammed (SAW) pointed to the Moon, and everyone saw the moon split into two bright halves.
This happened till the two sides of the moon were on either side of the Mountain of Light and then it was brought together.
The Quraysh saw it with their own eyes, but they said it was just magic. They saw a Miracle. They did not believe.
Source
Quran:
Surah Al Qamar verse -2
https://quran.com/en/al-qamar/1-2
Arabic: "اقْتَرَبَتِ السَّاعَةُ وَانشَقَّ الْقَمَرُ وَإِن يَرَوْا آيَةً يُعْرِضُوا وَيَقُولُوا سِحْرٌ مُّسْتَمِرٌّ"
English: "The Hour has come near, and the moon has split [in two]. And if they see a miracle, they turn away and say, 'Passing magic.'"
Sunnah:
https://sunnah.com/bukhari:3637
61 Virtues and Merits of the Prophet (pbuh) and his Companions
(27) Chapter: The miracle of the splitting of the moon
Narrated Anas:
That the Meccan people requested Allah's Messenger (ﷺ) to show them a miracle, and so he showed them the splitting of the moon.
حَدَّثَنِي عَبْدُ اللَّهِ بْنُ مُحَمَّدٍ، حَدَّثَنَا يُونُسُ، حَدَّثَنَا شَيْبَانُ، عَنْ قَتَادَةَ، عَنْ أَنَسِ بْنِ مَالِكٍ،. وَقَالَ لِي خَلِيفَةُ حَدَّثَنَا يَزِيدُ بْنُ زُرَيْعٍ، حَدَّثَنَا سَعِيدٌ، عَنْ قَتَادَةَ، عَنْ أَنَسِ بْنِ مَالِكٍ ـ رضى الله عنه ـ أَنَّهُ حَدَّثَهُمْ أَنَّ أَهْلَ مَكَّةَ سَأَلُوا رَسُولَ اللَّهِ صلى الله عليه وسلم أَنْ يُرِيَهُمْ آيَةً، فَأَرَاهُمُ انْشِقَاقَ الْقَمَرِ.