The miracle of the prophet muhammad salla Allaahu alayhi wasalaam are many and there is no prophet but was given a miracle.

 The miracle of the prophet muhammad salla Allaahu alayhi wasalaam are many    and there  is no prophet but was given a miracle. 

The prophet salla Allahu alayhi wasalam said, 

There was no prophet that was sent but was given a miracle but the miracle i was given was the Qur'an. 

And among the greatest miracle of the Prophet Muhammad salla Allahu alayhi wasalam was splitting the moon. 

Allah says, 

Al-Qamar 54:1

The Hour has come near, and the moon has split [in two].[1]

Al-Qamar 54:2

And if they see a sign [i.e., miracle], they turn away and say, "Passing magic."[1]

This was a great miracle when Abu Jahl and his people came to ask the Prophet to make a miracle for them, He salla Allahu alayhi wasalam asked them which miracle they want? 

They said we want to see the moon split. 

So the prophet peace be upon Him said if he made the moon split, will they believe in him? 

They said Yes and the prophet made dua and the moon splitted into two that was clear to be seen in the outskirt of Makkah. 

But when they saw this, they said this is a magic. 

Also the prophet did a miracle by using a small milk to feed 60 people. 

As reported, 

Narrated Abu Huraira:

By Allah except Whom none has the right to- be worshipped, (sometimes) I used to lay (sleep) on the ground on my liver (abdomen) because of hunger, and (sometimes) I used to bind a stone over my belly because of hunger. One day I sat by the way from where they (the Prophet (ﷺ) and his companions) used to come out. When Abu Bakr passed by, I asked him about a Verse from Allah's Book and I asked him only that he might satisfy my hunger, but he passed by and did not do so. Then `Umar passed by me and I asked him about a Verse from Allah's Book, and I asked him only that he might satisfy my hunger, but he passed by without doing so. Finally Abu-l-Qasim (the Prophet (ﷺ) ) passed by me and he smiled when he saw me, for he knew what was in my heart and on my face. He said, "O Aba Hirr (Abu Huraira)!" I replied, "Labbaik, O Allah's Messenger (ﷺ)!" He said to me, "Follow me." He left and I followed him. Then he entered the house and I asked permission to enter and was admitted. He found milk in a bowl and said, "From where is this milk?" They said, "It has been presented to you by such-and-such man (or by such and such woman)." He said, "O Aba Hirr!" I said, "Labbaik, O Allah's Messenger (ﷺ)!" He said, "Go and call the people of Suffa to me." These people of Suffa were the guests of Islam who had no families, nor money, nor anybody to depend upon, and whenever an object of charity was brought to the Prophet, he would send it to them and would not take anything from it, and whenever any present was given to him, he used to send some for them and take some of it for himself. The order of the Prophet upset me, and I said to myself, "How will this little milk be enough for the people of As- Suffa? though I was more entitled to drink from that milk in order tostrengthen myself", but behold! The Prophet (ﷺ) came to order me to give that milk to them. I wondered what will remain of that milk for me, but anyway, I could not but obey Allah and His Apostle so I went to the people of As-Suffa and called them, and they came and asked the Prophet's permission to enter. They were admitted and took their seats in the house. The Prophet (ﷺ) said, "O Aba-Hirr!" I said, "Labbaik, O Allah's Messenger (ﷺ)!" He said, "Take it and give it to them." So I took the bowl (of milk) and started giving it to one man who would drink his fill and return it to me, whereupon I would give it to another man who, in his turn, would drink his fill and return it to me, and I would then offer it to another man who would drink his fill and return it to me. Finally, after the whole group had drunk their fill, I reached the Prophet (ﷺ) who took the bowl and put it on his hand, looked at me and smiled and said. "O Aba Hirr!" I replied, "Labbaik, O Allah's Messenger (ﷺ)!" He said, "There remain you and I." I said, "You have said the truth, O Allah's Messenger (ﷺ)!" He said, "Sit down and drink." I sat down and drank. He said, "Drink," and I drank. He kept on telling me repeatedly to drink, till I said, "No. by Allah Who sent you with the Truth, I have no space for it (in my stomach)." He said, "Hand it over to me." When I gave him the bowl, he praised Allah and pronounced Allah's Name on it and drank the remaining milk.

Sahih al-Bukhari 6452