The Iron - 57:10
What is wrong with you that you spend not in the way of Allah, while to Allah belongs the riches of the heavens and the earth. Those of you who spend and fight before the victory are not equal to those who spend and fight afterwards; they are superior to them. Allah has promised salvation to every one of them. Allah is aware of all that you do.
Related:
The Repentance/9:34
O you who believe, most of the scribes and religious leaders eat the people´s money without right and lead them astray from the way of Allah. Give glad tidings of a painful torment to those who hoard gold and silver and spend it not in the way of Allah.
The Repentance/9:74
Although they speak words of disbelief and disbelieve after they have surrendered, they swear by Allah that they did not say them. In fact, they strived hard for what they could never attain. They sought revenge after Allah and His messenger had enriched them with His grace! It would be good for them if they repent. If they turn away, Allah will punish them with a painful torment in this world and in the Hereafter, and they will have neither friends nor helpers in the earth.
The Repentance/9:75
"Some of them even promised Allah, "If He grants us out of His bounty, we will spend our money for charity and we will be of the righteous people."
The Repentance/9:76
But when He gave them out of His bounty, they became stingy and turned away.
The Repentance/9:77
Because they broke their promise to Allah and lied, He put hypocrisy in their hearts until the Day when they will meet Him.
The Repentance/9:78
Do they not know that Allah knows what they conceal and what they whisper, and Allah is All-Knowing of all that is hidden?
The Repentance/9:81
"Those who remained behind liked their place behind the Messenger of Allah and disliked to strive in the Way of Allah with their money and their lives and said: "Do not move in this heat,"they said. Say, "The fire of hell is hotter."If only they understood!"
The Hypocrites/63:7
"They are the ones who say: "Do not help those who are with the Messenger of Allah so that they may be scattered."But to Allah belong the treasures of the heavens and the earth, but the hypocrites cannot comprehend."
Muhammad/47:38
You are called to spend in the Way of Allah, but some of you are stingy. Whoever is stingy is stingy towards himself. Allah is rich and you are poor. If you turn away, He will replace you with another people, but they will not be like you.