God Almighty granted the prophets a set of proofs and miracles for people to believe in them. The first miracle of Muhammad - may God’s prayers and peace be upon him - was the Qur’an. Then he gave him a set of other miracles such as the splitting of the moon, the Night Journey, and other miracles and proofs of his sincerity. The Holy Qur’an, the Sunnah and the Prophet’s biography have transmitted to us a set of these miraclesThe Miracles of the Prophet is an outstanding book of Al-Muhadith Ibn Katheer which deals with the miracles performed by the Prophet over the twenty three years of prophecy.[Source: link]