Quran Chapter 2 Verse 180-183
Prescribed for you when death approaches [any] one of you if he leaves wealth [is that he should make] a bequest for the parents and near relatives according to what is acceptable – a duty upon the righteous.
Then whoever alters the bequest after he has heard it – the sin is only upon those who have altered it. Indeed, Allah is Hearing and Knowing.
But if one fears from the bequeather [some] error or sin and corrects that which is between them, there is no sin upon him. Indeed, Allah is Forgiving and Merciful.
O you who have believed, decreed upon you is fasting as it was decreed upon those before you that you may become righteous –