Muhammad (s.a.a.w.) was of a height a little above the average. He was of sturdy build with long muscular limbs and tapering fingers. The hair of his head was long and thick with some waves in them. His forehead was large and prominent, his eyelashes were long and thick, his nose was sloping, his mouth was somewhat large and his teeth were well set. His cheeks were spare and he had a pleasant smile. His eyes were large and black with a touch of brown. His beard was thick and at the time of his death, he had seventeen grey hairs in it. He had a thin line of fine hair over his neck and chest. He was fair of complexion and altogether was so handsome that Abu Bakr composed this couplet about him:
"As there is no darkness in the moonlit night so is Mustafa, the well-wisher, bright."
His gait was firm and he walked so fast that others found it difficult to keep pace with him. His face was genial but at times, when he was deep in thought, there there were long periods of silence, yet he always kept himself busy with something. He did not speak unnecessarily and what he said was always to the point and without any padding. At times he would make his meaning clear by slowly repeating what he had said. His laugh was mostly a smile. He kept his feelings under firm control - when annoyed, he would turn aside or keep silent, when pleased he would lower his eyes [Tirmidhi].
His dress generally consisted of a shirt, tamad (trousers), a sheet thrown round the shoulders and a turban. On rare occasions, he would put on costly robes presented to him by foreign emissaries in the later part of his life. [Ahmed, Musnad, Hafiz Bin Qayyim]
His blanket had several patches. [Tirmidhi] He had very few spare clothes, but he kept them spotlessly clean. [Bukhari] He wanted others also to put on simple but clean clothes. Once he saw a person putting on dirty clothes and remarked,
"Why can't this man wash them." [Abu Dawood]
On another occasion he enquired of a person in dirty clothes whether he had any income. Upon getting a reply in the affirmative, he observed,
"When Allah has blessed you with His bounty, your appearance should reflect it." [Abu Dawood]
He used to observe:
"Cleanliness is piety."
Reference url: http://muslim-canada.org/muhammadatharhusain.html
His charity was of various kinds. Sometimes he gave a gift; sometimes he borrowed something and repaid it generously; sometimes he bought a thing and paid more than the price to the seller; and sometimes he gave charity. He accepted gifts from other people but always gave more gifts in return for them.
Muhammad never said no to any request from anyone in his life. He used to say that he was only a distributor and a treasurer and that Allah was the Bestower of everything. Once a man came to him and saw his herd of goats stretching over a vast area. He requested help and Muhammad gave him the whole herd of goats. He went back to his people and told them to accept Islam, for Muhammad was so generous that there was no fear of poverty. Another man asked him for help when he had nothing to give, so he told the man to borrow on his behalf and he would repay the loan. `Umar, who was present, asked Muhammad whether Allah had not burdened him more than he could bear. The Prophet kept quiet. However, a man was present there who offered to help. Muhammad smiled with great joy at his offer.
Muhammad was so generous that he always gave something to anyone who asked him for help, but if he had nothing, he promised help later on. Sometimes it so happened that Muhammad purchased an article for himself, then gave it as a gift to the seller. Once he bought a camel from `Umar and straightaway gave it as a gift to `Umar’s son `Abdullah. Once he bought something from Jabir and gave it back to him as a gift.
Sometimes Allah blessed the food that the Prophet shared so that it multiplied to feed many. During one battle, there were 130 Companions with the Prophet. He bought one goat, slaughtered it and ordered its liver to be roasted. When it was ready, he distributed it among all the Companions and kept a share for those who were not present.
Whenever he received anything, he did not sit in peace until it was finished. Umm Salmah, the Prophet's wife, reported that one day Allah's Messenger came home looking disturbed. She asked him what the matter was. He replied that the seven dinars he had received the day before had remained on the bed until evening and had not been distributed. He did not rest until they were given away.
Abu Dharr reported that one evening he was walking with Allah's Messenger when he said, "Abu Dharr, if the mountain of Uhud were turned into gold for me, I would not like three nights to pass and one dinar still be left with me, excepting what I would leave for paying my debts." He would never rest until all the cash in the house was completely finished. Once the Prophet went home in a hurry after the prayer and then immediately came out again. The people were surprised, but he told them that he had remembered during the prayer that there was some gold in his house. He thought that he might forget and the gold might remain there all night. He went back home to ask that it might immediately be given in charity.
He always paid the debts of the dead and issued instructions to the effect that if anyone died leaving any debt, he should be informed of it so that he could pay it off.
Whenever Muhammad met any miserly person, he advised him to be more generous and charitable. Ibn `Abbas said that he heard Allah's Messenger say, "The believer is not the one who eats when his neighbor beside him is hungry," Abu Hurayrah reported Allah's Messenger as saying, "The believer is simple and generous, but the wicked person is deceitful and ignoble." In short, Muhammad was so generous and charitable that he never kept anything surplus for himself but gave all to those who came to him for help.
A Poem on Prophet Muhammad (s.a.a.w.) by Allama Iqbal
He slept on a mat of rushes,
But the crown of Chosroes lay beneath the feet of his followers;
He chose the nightly solitude of Mount Hira,
And founded a nation, law and government;
He passed his nights with sleepless eyes,
That his Millet might sleep on Chosroes throne
In the hour of battle, iron was melted by the flash of his sword.
At prayer time, tears fell like drops of rain from his eyes.
In his prayer for Divine help, his Amen' was a sword,
Which extirpated the lineage of kings.
He inaugurated a new Order in the world,
He brought the empires old to an end:
In his sight the high and the low were one,
He sat with the slave at table one;
He burnt clear the distinctions of birth and clan.
His fire consumed all this trash and bran.