Volume 4, Book 53, Number 347 :
Narrated by Khaula Al-Ansariya (radiallaahu `anhaa)
I heard Allah’s Apostle (sallallaahu `alayhi wasallam) saying, “Some people spend Allah’s Wealth (i.e. Muslim’s wealth) in an unjust manner; such people will be put in the (Hell) Fire on the Day of Resurrection.”
This specifically talks about distribution of war booty, as it’s mentioned in the chapter of Khumus in Bukhari. Those in charge of the wealth must see to the fair distribution among the poor and the weak.
Ibn Al-Jawzi said:
“Injustice necessitates two sins: usurping others’ rights and defying Allaah The Exalted with disobedience. The sin of doing injustice is more evil than other sins because it is usually committed against the weak, who are powerless to fend for themselves. The cause of injustice is the darkness of the heart; a man whose heart is lit with guidance would not commit injustice.”
Further reading: Dire Consequences of Injustice