May peace be on all of you,
As for miracles performed by Prophet Muhammad(puh), his greatest miracle was the Quran itself. Other than this, he performed many miracles during his Prophethood including parting the moon, which is mentioned in a number of Hadith as well as the Quran itself, which says in Surah Qamar, verse 1:
"The Hour (of Judgment) is nigh, and the moon is cleft asunder. "