He was asked—may Allah have mercy on him:

Concerning a woman who died leaving no heir except the son of her maternal half-sister, having bequeathed more than one-third of her estate to charity: may the executor carry out this bequest and give the remainder to her sister’s son?

He replied:

The beneficiary is to be given one-third. Any excess is valid if the heir approves it; otherwise, it is invalid. According to those who recognize the inheritance rights of distant kindred, the sister’s son inherits the entire estate and is the heir in this case. This is the position of the majority of the early generations, Abū Hanīfa, Ahmad, and groups of scholars within the school of al-Shāfi‘ī. It is also a position within Mālik’s school when the public treasury is corruptly administered. And Allah knows best.

He was asked:

Concerning a man who died leaving six sons, a son’s son, and a son’s daughter. He bequeathed to his son’s son a share equal to that of one of his sons, and to his son’s daughter one-third of what remained of the estate’s third after his son’s son had been given his share. What would each of his sons receive?

He replied:

Praise be to Allah. The apparent position of the schools of al-Shāfi‘ī, Ahmad, and Abū Hanīfa is that this estate is divided into sixty shares, with eight for each son. The beneficiary of the bequest receives one-third of what remains after the third: twelve, one-third of which is four. There are methods by which this calculation is worked out. The answer to this question is well known in scholarly works.