﴿ ۞ وَلَكُمْ نِصْفُ مَا تَرَكَ أَزْوَٰجُكُمْ إِن لَّمْ يَكُن لَّهُنَّ وَلَدٌۭ ۚ فَإِن كَانَ لَهُنَّ وَلَدٌۭ فَلَكُمُ ٱلرُّبُعُ مِمَّا تَرَكْنَ ۚ مِنۢ بَعْدِ وَصِيَّةٍۢ يُوصِينَ بِهَآ أَوْ دَيْنٍۢ ۚ وَلَهُنَّ ٱلرُّبُعُ مِمَّا تَرَكْتُمْ إِن لَّمْ يَكُن لَّكُمْ وَلَدٌۭ ۚ فَإِن كَانَ لَكُمْ وَلَدٌۭ فَلَهُنَّ ٱلثُّمُنُ مِمَّا تَرَكْتُم ۚ مِّنۢ بَعْدِ وَصِيَّةٍۢ تُوصُونَ بِهَآ أَوْ دَيْنٍۢ ۗ وَإِن كَانَ رَجُلٌۭ يُورَثُ كَلَٰلَةً أَوِ ٱمْرَأَةٌۭ وَلَهُۥٓ أَخٌ أَوْ أُخْتٌۭ فَلِكُلِّ وَٰحِدٍۢ مِّنْهُمَا ٱلسُّدُسُ ۚ فَإِن كَانُوٓا۟ أَكْثَرَ مِن ذَٰلِكَ فَهُمْ شُرَكَآءُ فِى ٱلثُّلُثِ ۚ مِنۢ بَعْدِ وَصِيَّةٍۢ يُوصَىٰ بِهَآ أَوْ دَيْنٍ غَيْرَ مُضَآرٍّۢ ۚ وَصِيَّةًۭ مِّنَ ٱللَّهِ ۗ وَٱللَّهُ عَلِيمٌ حَلِيمٌۭ ﴾

“And you shall inherit one-half of what your wives leave behind, provided they have left no child; but if they have left a child, then you shall have one-quarter of what they leave behind, after [the deduction of] any bequest they may have made, or any debt [they may have incurred]. And your widows shall have one-quarter of what you leave behind, provided you have left no child; but if you have left a child, then they shall have one-eighth of what you leave behind, after [the deduction of] any bequest you may have made, or any debt [you may have incurred]. And if a man or a woman has no heir in the direct line, but has a brother or a sister, then each of these two shall inherit one-sixth; but if there are more than two, then they shall share in one-third [of the inheritance], after [the deduction of] any bequest that may have been made, or any debt [that may have been incurred], neither of which having been intended to harm [the heirs]. [This is] an injunction from God: and God is all-knowing, forbearing.”

Payment of the dues of orphans, abiding by wills, release of the inheritance to the inheritors, etc., are among those matters on which a man’s being sent to hell or heaven depends. To make out a will disposing of one-third part of one’s property is permissible by Islamic law. But anyone making out a will with the intention of depriving a person of his rightful inheritance, would be committing a sin that could condemn him to Hell. Man has to follow the law of God in this regard and not his own personal desires or family expediencies.