1. Those who do not pay Zakah

In one hadith, RasulAllah sallallahu ‘alayhi wa sallam says, “Whoever is made wealthy by Allah and does not pay the Zakat of his wealth, then on the Day of Resurrection his wealth will be made like a bald-headed poisonous male snake with two black spots over the eyes. The snake will encircle his neck and bite his cheeks and say, ‘I am your wealth, I am your treasure.’” Then the Prophet recited the holy verses: “And let not those who covetously withhold of that which Allah has bestowed on them of His Bounty (Wealth) think that it is good for them (and so they do not pay the obligatory Zakat). Nay, it will be worse for them; the things which they covetously withheld shall be tied to their necks like a collar on the Day of Resurrection. And to Allah belongs the heritage of the heavens and the earth; and Allah is Well­ Acquainted with all that you do.” (3:180) [Bukhaari, 2/24/486] This is one form of punishment.

And then, RasulAllah sallallahu ‘alayhi wa sallam mentions in another hadith, “If any owner of gold or silver does not pay what is due on him, when the Day of Resurrection would come, plates of fire would be beaten out for him; these would then be heated in the fire of Hell and his sides, his forehead and his back would be cauterized with them. Whenever these cool down, (the process is) repeated during a day the extent of which would be fifty thousand years, until judgment is pronounced among servants, and he sees whether his path is to take him to Paradise or to Hell.” It was said: “Messenger of Allah, what about the camel?” He (the Prophet) said: “If any owner of the camel does not pay what is due on him, and of his due in that (camel) is (also) to milk it on the day when it comes down to water. When the Day of Resurrection comes a soft sandy plain would be set for him, as extensive as possible, (he will find) that not a single young one is missing, and they will trample him with their hoofs and bite him with their mouths. As often as the first of them passes him, the last of them would be made to return during a day the extent of which would be fifty thousand years, until judgment is pronounced among servants and he sees whether his path is to take him to Paradise or to Hell.” It was (again) said: “Messenger of Allah, what about cows (cattle) and sheep?” He said: “If any owner of the cattle and sheep does not pay what is due on them, when the Day of Resurrection comes a soft sandy plain would be spread for them, he will find none of them missing, with twisted horns, without horns or with a broken horn, and they will gore him with their horns and trample him with their hoofs. As often as the first of them passes him, the last of them would be made to return to him during a day the extent of which would be fifty thousand years, until judgment would be pronounced among the servants. And he would be shown his path-path leading him to Paradise or to Hell.” [...] [And the hadith is much longer than this.] [Muslim, B.5, /2161]

To be miserly over a small amount of money and then suffer for 50,000 years is not worth it at all. You won’t have barakah [blessing] in that money in the first place, and then on top of that, you pay the price for it in akhirah. The money that was withheld in dunya and spent over a short period of time, you will pay for it so much longer in the akhirah – because you won’t live 50,000 years. Allah subhaana wa ta’aala will give. You weren’t created with anything, and Allah provided you with what you have today. He gave it and He can take it away. So you have your rizq [sustenance] already written for you.