Dont eat up properties

O you who believe! Eat not up your properties among yourselves unjustly except it be a trade amongst you, by mutual consent. And do not kill yourselves (nor kill one another). Surely, Allâh is Most Merciful to you.
And whoever commits that through aggression and injustice, We shall cast him into the Fire, and that is easy for Allâh.
If you avoid the great sins[] which you are forbidden to do, We shall expiate from you your (small) sins, and admit you to a Noble Entrance (i.e. Paradise).
An-Nisa 29-31