Zakat (Kitab Al-Zakat)
Dawud :: Book 9 : Hadith 1694
Narrated Abdullah ibn Amr ibn al-'As:
The Apostle of Allah (peace_be_upon_him) preached and said: Abstain from avarice, for those who had been before you were annihilated due to avarice. It (avarice) commanded them to show niggardliness; it commanded them to cut off their relationship with their nearest relatives, so they cut off. It commanded them to show profligacy, so they showed it.