وَالَّذِينَ يَكْنِزُونَ الذَّهَبَ وَالْفِضَّةَ وَلاَ يُنفِقُونَهَا فِي سَبِيلِ اللّهِ فَبَشِّرْهُم بِعَذَابٍ أَلِيمٍ
“And to those who hoard gold and silver and do not spend it in Allah’s way, announce the news of painful punishment”
Imam Sadiq (as) said, Those of our Shia who are wealthy should spend their wealth in the way of Allah. When our Qaem (as) rises, the wealth of every wealthy person will be unlawful to him unless he offers it to our Qaem (as) to use it against his enemies, for Allah says, “And to those who hoard gold and silver and do not spend it in Allah’s way, announce the news of painful punishment”. (Al Kafi volume 4 page 61; Tafseer Ayyashi volume 2 page 86)
Imam Sadiq (as) said, A believer who spends from his wealth for the expenses of his family (before the rising of the Qaem (as), but offers it to the Qaem (as) after his rising has performed his duties. (Tafseer Ayyashi volume 2 page 87)