Warning Against Transgressing the Limits for Inheritance
Allah said;
تلك حدود الله
These are the limits (set by) Allah,
Meaning, the Fara'id are Allah's set limits. This includes what Allah has allotted for the heirs, according to the degree of relation they have to the deceased, and their degree of dependency on him. Therefore, do not transgress or violate them.
So Allah said;
ومن يطع الله ورسوله
And whosoever obeys Allah and His Messenger,
regarding the inheritance, and does not add or decrease any of these fixed shares by use of tricks and plots. Rather, he gives each his appointed share as Allah commanded, ordained and decided,
يدخله جنات تجري من تحتها اﻻنهار خالدين فيها وذلك الفوز العظيم
Will be admitted to Gardens under which rivers flow (in Paradise), to abide therein, and is the great success
ومن يعص الله ورسوله ويتعد حدوده يدخله نارا خالدا فيها وله عذاب مهين