Salaam/Peace
What is the Qur'anic instruction on inheritance? I am not familiar with it yet.
An-Nisa | The Women
There is a share for men and a share for women from what is left by parents and those nearest related, whether the property be small or large - a legal share
( 4:7)
Allah commands you as regards your childrens (inheritance); to the male, a portion equal to that of two females; if (there are) only
daughters, two or more, their share is two thirds of the inheritance; if only one, her share is half.
For parents, a sixth share of inheritance to each if the deceased left children; if no children, and the parents are the (only) heirs, the mother has a third; if the deceased left brothers or (sisters), the mother has a sixth.
(The distribution in all cases is) after the payment of legacies he may have bequeathed or debts. You know not which of them, whether your parents or your children, are nearest to you in benefit, (these fixed shares) are ordained by Allah. And Allah is Ever AllKnower, AllWise.
( سورة النساء , An-Nisa, Chapter
#4, Verse
#11)
They ask you for a legal verdict. Say: "Allah directs (thus) about Al-Kalalah (those who leave neither descendants nor ascendants as heirs). If it is a man that dies leaving a sister, but no child, she shall have half the inheritance. If (such a deceased was) a woman, who left no child, her brother takes her inheritance. If there are two sisters, they shall have two-thirds of the inheritance; if there are brothers and sisters, the male will have twice the share of the female. (Thus) does Allah make clear to you (His Law) lest you go astray. And Allah is the All-Knower of everything."
4 : 176
http://www.searchtruth.com/chapter_display.php?chapter=4&translator=5