God’s Most Noble Messenger (Upon whom be blessings and peace) declared his prophethood, and presented to humanity such a decree as the Qur’an of Mighty Stature and such manifest miracles as number, according to the scholars, one thousand.(3) The occurrence of those miracles in their entirety is as certain as the fact that he declared himself prophet. In fact, as is shown by the words of the most obstinate unbelievers quoted in various places of the Wise Qur’an, even they could not deny the occurrence of his miracles, but only called them God forbid! sorcery, in order to satisfy themselves, or to deceive their followers.
The miracles of Muhammad (PBUH) have the certainty of confirmation by consensus to the hundredth degree. The miracle is the confirmation by the Creator of the cosmos of his declaration of prophethood; it has the effect of the words, “You have spoken truly!” Suppose that you said in the assembly of a ruler, while being observed by him, “The ruler has appointed me to such-and-such a position.” At a time when you were asked for a proof of your claim, the word “Yes” uttered by the ruler would sufficiently support you. Or, if the ruler changed his usual practice and attitude at your request, this would confirm your claim even more soundly and more definitely than would the word “Yes.”
-----------------------------------------(3) Al-‘Asqalânî, Fath al-Bârî vi, 454; Muslim (Sharh: nawawî) i,2