From the Qur'an
     Allah says: "O you who believe! Most surely many of the    doctors of law and the monks eat away the property of men    falsely and turn them from Allah's way; and as for those    who hoard treasures of gold and silver and do not spend    them for the sake of Allah--warn them of grievous    sufferings [in the life to come]. On the Day when that    [hoarded wealth] shall be heated in the Fires of Hell and    their foreheads and their sides and their backs branded    with it, [it will be said to them:] 'These are the    treasures which you have hoarded for yourselves. Now    taste of what you used to accumulate!' [at-Taubah    34-35]." He also says: "And they should not think--they    who avariously cling to all that Allah has granted them    out of His bounty--that this is good for them. No, it is    bad for them, for that which they hoard will be hung    about their necks on the Day of Judgment" [al-'Imran    180].
    
From the Hadith
     Ahmad, al-Bukhari, and Muslim relate from Abu Hurairah    that the Messenger of Allah, upon whom be peace, said:    "No owner of a treasure who does not pay zakah will be    spared, for his treasure will be heated in the Fires of    Hell and then made into plates. His flanks and his    forehead will be branded with them until Allah pronounces    judgment on His servants during a day lasting fifty    thousand years.
         [The individual] will be shown his path, leading him    either to Paradise or to Hell. A camel owner who does not    pay zakah will not be spared (either). He will lay flat    on a sandy, soft plain and they will run over him heavily    one after another until Allah pronounces judgment on His    servants during a day lasting fifty thousands years. [The    individual in question] will then be shown his path,    leading him either to Paradise or to Hell. Equally, no    owner of goats who does not pay zakah (will be spared).
    He will lay flat for them on a sandy plain, and the goats    will run over him as heavy as they will come and they    will trample him with their hoofs and gore him with their    horns--with twisted horns or with no horns--one after    another until Allah pronounces judgment on His servants,    during a day lasting fifty thousand years, and [the    individual in question] will be shown the path, leading    him either to Paradise or to Hell. They [the Companions]    asked: 'O Messenger of Allah, what about the horses?' He    said: 'Horses have goodness in their foreheads (or he    said 'Goodness lies in the foreheads of the horses')    until the Day of Judgment. Horses are of three kinds:    they are a source of reward for the owner, they are a    cover, or they are a burden to a person. As to those    [horses] that bring rewards, one who raises and trains    them for the sake of Allah will get a reward from Him as    well as all that they consume will be considered a reward    for him from Allah. For every stalk of grass in the    meadow that one lets them graze, there is a reward for    him. For every drop of water that one lets them drink    from the creek, there is a reward.' He went on describing    until a reward was mentioned even for their urine and    their feces.
         'And for every step that they prance on elevated ground,    there is a reward. As for the one to whom they will    provide cover [in the life hereafter], he is the one who    raises them for honor and dignity and remembers the right    of their backs and stomachs in plenty and adversity. As    for the one to whom they are a burden, he is the one who    raises them for glory and showing off to people.' They    asked: 'O Messenger of Allah, what about donkeys?' He    said: 'Allah has not revealed to me anything in regard to    them except this one comprehensive verse: 'He who does an    atom's weight of good will see it, and he who does an    atom's weight of evil will see it' [az-Zalzalah 7]."
         Al-Bukhari and Muslim relate from Abu Hurairah that the    Prophet, upon whom be peace, said: "Whoever is made    wealthy by Allah and does not pay zakah on his wealth, on    the Day of Judgment it will become a bald-headed,    poisonous, male snake with two black spots over his eyes.
    The snake, on the Day of Judgment, will encircle his    neck, and bite his cheeks and say: 'I am your treasure, I    am your wealth.' " Then he [the Prophet] recited this    'ayah: " 'And let not those who hoard up that which Allah    has bestowed upon them of his bounty...' [al'Imran 180]."
         Ibn Majah, al-Bazzar, and al-Baihaqi relate from Ibn    'Umar that the Messenger of Allah, upon whom be peace,    said: "O Muhajirun, beware of five traits: if ever    immorality spreads in a community and there is no sense    of shame on its occurrence or mentioning it [and people    talk about it as if nothing bad has taken place],    diseases which were not present in the time of their    predecessors will spread among them. If they decrease the    measure and weight (of sold grains or food), they will be    overcome by poverty, their provisions will decrease and    their ruler will be unjust. If they refrain from paying    the zakah due on their properties, they will be deprived    of rain, unless they get it only for the sake of their    cattle. If they renounce their commitment to Allah and    His Messenger, they will be governed by an enemy who is a    stranger to them and who will take away some of what they    possess. If their rulers do not rule according to Allah's    Book, they will be afflicted by civil war. Allah forbid    that these should happen to you."
         Al-Bukhari and Muslim relate from al-Ahnaf ibn Qays that    he said: "I was in the company of some men of Quraish,    when a man (Abu Dharr al-Ghafari, a companion of the    Prophet) came with coarse hair, clothes, and appearance.
    He stood up, greeted them and said: 'Inform those who    hoard property that a stone will be heated in the Fires    of Hell and then placed on the nipples of their breasts    until it comes out from the top of their shoulders. It    will then be placed on the top of their shoulders until    it comes out again from the nipple of their breasts, and    they will be shaken.' Then he left. I followed him and    sat near him, not knowing who he was. I said: 'These    people disliked what you said to them.' He observed:    'They do not understand anything that my friend said to    me.' I asked: 'Who is your friend?' He replied: 'The    Prophet, upon whom be peace. [One day he asked me]: 'Do    you see the Mount of Uhud?' I looked at the sun to see    how much of the day was left, as I thought that the    Messenger of Allah, upon whom be peace, wanted to send me    on an errand for him. I said: 'Yes.' Upon this he said:    'Nothing would delight me more than having gold equal to    the bulk of Uhud and spending all of it (in Allah's way)    except three dinars.'         'Indeed, these people do not understand and go on    accumulating riches. By Allah! I neither ask them for    this world, nor do I ask them anything about religion    until I meet Allah, The Exalted One.' "    
We are identifying and building the related set of Ayahs for this Hadith. Please share your feedback and let us know if you identify any referencing issues.
"When a person dies, his works end, except for three: ongoing charity, knowledge that is benefited from, and a righteous child who prays for him."
Prophet Mohammed (PBUH)
"The best of what a man leaves behind are three: a righteous child who supplicates for him, ongoing charity the reward of which reaches him, and knowledge that is acted upon after him."
Sunan Ibn Mājah
"Every day two angels come down from Heaven and one of them says, 'O Allah! Compensate every person who spends in Your Cause,' and the other (angel) says, 'O Allah! Destroy every miser.'"
Sahih Bukhari