Sura al-Nisāʾ 4:176

يَسْتَفْتُونَكَ قُلِ ٱللَّـهُ يُفْتِيكُمْ فِى ٱلْكَلَٰلَةِ إِنِ ٱمْرُؤٌا۟ هَلَكَ لَيْسَ لَهُۥ وَلَدٌ وَلَهُۥٓ أُخْتٌ فَلَهَا نِصْفُ مَا تَرَكَ وَهُوَ يَرِثُهَآ إِن لَّمْ يَكُن لَّهَا وَلَدٌ فَإِن كَانَتَا ٱثْنَتَيْنِ فَلَهُمَا ٱلثُّلُثَانِ مِمَّا تَرَكَ وَإِن كَانُوٓا۟ إِخْوَةً رِّجَالًا وَنِسَآءً فَلِلذَّكَرِ مِثْلُ حَظِّ ٱلْأُنثَيَيْنِ يُبَيِّنُ ٱللَّـهُ لَكُمْ أَن تَضِلُّوا۟ وَٱللَّـهُ بِكُلِّ شَىْءٍ عَلِيمٌۢ

yastaftūnaka quli allāhu yuftīkum fī l-kalālati ini imrūʾun halaka laysa lahu waladun wa-lahu ukhtun fa-lahā niṣfu mā taraka wa-huwa yarithuhā in lam yakun llahā waladun fa-in kānatā ithnatayni falahumā l-thuluthāni mimmā taraka wa-in kānū ikhwatan rrijālan wa-nisāan fa-lil-dhakari mithlu ḥaẓẓi l-unthayayni yubayyinu allāhu la-kum an taḍillū wallāhu bi-kulli shayʾin ʿalīmun

They ask thee for a legal decision. Say: Allah directs (thus) about those who leave no descendants or 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 (between them): if there are brothers and sisters, (they share), the male having twice the share of the female. Thus doth Allah make clear to you (His law), lest ye err. And Allah hath knowledge of all things.