GodlyVerses

They request from you a [legal] ruling. Say, "Allah gives you a ruling concerning one having neither descendants nor ascendants [as heirs]." If a man dies, leaving no child but [only] a sister, she will have half of what he left. And he inherits from her if she [dies and] has no child. But if there are two sisters [or more], they will have two-thirds of what he left. If there are both brothers and sisters, the male will have the share of two females. Allah makes clear to you [His law], lest you go astray. And Allah is Knowing of all things. - Quran An-Nisa(The Women) 4:176 (islam)

The estate of the apostate goes to the Muslim community. - Fiqh Rissala 37.19i (islam)

CO-UNIVERSAL HEIR The co-universal heir is any female deserving an obligatory share who requires someone else in order to become a universal heir, and with whom she participates in this universal share.
It is a class confined to four types of women, those whose share if alone is one-half, and if there are more than one is two-thirds. They are:
(1) X's daughter;
(2) X's son's daughter;
(3) X's full sister;
(4) and X's half sisterfrom the same father.
Whenever a male exists with one of these four who is universal heir by himself (def: LIO.2), of the same generation as her and of the same strength (N: i.e. both are full or halfsiblings), she becomes co-universal heir with him and inherits by the universal share, not her obligatory share. They divide the universal share so the male receives the portion of two females.
UNIVERSAL HEIR THROUGH TfJE EXISTENCE - Fiqh Umdat l10.3 (islam)

Allah instructs you concerning your children: for the male, what is equal to the share of two females. But if there are [only] daughters, two or more, for them is two thirds of one's estate. And if there is only one, for her is half. And for one's parents, to each one of them is a sixth of his estate if he left children. But if he had no children and the parents [alone] inherit from him, then for his mother is one third. And if he had brothers [or sisters], for his mother is a sixth, after any bequest he [may have] made or debt. Your parents or your children - you know not which of them are nearest to you in benefit. [These shares are] an obligation [imposed] by Allah. Indeed, Allah is ever Knowing and Wise. - Quran An-Nisa(The Women) 4:11 (islam)

And for you is half of what your wives leave if they have no child. But if they have a child, for you is one fourth of what they leave, after any bequest they [may have] made or debt. And for the wives is one fourth if you leave no child. But if you leave a child, then for them is an eighth of what you leave, after any bequest you [may have] made or debt. And if a man or woman leaves neither ascendants nor descendants but has a brother or a sister, then for each one of them is a sixth. But if they are more than two, they share a third, after any bequest which was made or debt, as long as there is no detriment [caused]. [This is] an ordinance from Allah, and Allah is Knowing and Forbearing. - Quran An-Nisa(The Women) 4:12 (islam)

“The Muslim does not inherit from a disbeliever and the
disbeliever does not inherit from a Muslim.” - Hadith Ibn Majah 2729 (islam)
Book 23, Hadith 11
Vol. 4, Book 23, Hadith 2729

The Prophet is more worthy of the believers than themselves, and his wives are [in the position of] their mothers. And those of [blood] relationship are more entitled [to inheritance] in the decree of Allah than the [other] believers and the emigrants, except that you may do to your close associates a kindness [through bequest]. That was in the Book inscribed. - Quran Al-Ahzab(The Confederates) 33:6 (islam)