Anas reported that the people of Makkah demanded from Allah's Messenger (ﷺ) that he should show them (some) signs (miracles) and he showed them the splitting of the moon twice.
Related hadith on this topic
Explanation & Benefits
Shaykh Dr. Abdur Rahman Freywai
Explanation:
1:
In this hadith, the meaning of "martayn" is not that the incident of the moon splitting occurred twice.
This incident did not happen twice,
it happened only once.
Here, "martayn" refers to "two pieces" only.
Source: Sunan al-Tirmidhi – Majlis ‘Ilmi Dar al-Da‘wah, New Delhi Edition, Page: 3286