Allah (swt) said: “As for those who accumulate gold and silver and do not spend it in the way of Allah, give them the ‘good’ news of a painful punishment. On the day it (the wealth) will be heated up in the fire of Jahannam, then their foreheads and their sides and their backs shall be branded with it: ‘This is what you had accumulated for yourselves. So, taste what you have been accumulating.’” (Surah at-Taubah:34-5)

Rasulullah (saw) has said: "The person to whom Allah has bestowed wealth, and he does not give Zakat, on the Day of Resurrection, this wealth will be turned into a venomous bald serpent which will wind around his neck and bite his jaws and say, "I am your wealth, I am your treasure."(al-Bukhari)