(7) CHAPTER. The Statement of Allah: “Verily one-fifth (1/5th) of it is assigned to Allah and to the Messenger (p.b.u.h) ... (V.8:41).
Narrated Khaula Al-Ansariya: I heard Allah's Apostle 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.
Authentic