Buraida reported the Prophet as saying, “When we appoint someone to an administrative post and provide him with an allowance, anything he takes beyond that is unfaithful dealing."
'A’isha told that when Abu Bakr became caliph he said, “My people know that my trade was not incapable of supporting my family, but I have become occupied with the affairs of the Muslims, so Abu Bakr’s family will be supported from this property while he works for it on behalf of the Muslims."
Khaula al-Ansariya reported God’s Messenger as saying, “Men will unjustly acquire for themselves property which belongs to God, and on the day of resurrection they will go to hell."