Harms of Severing Family Ties

Just as the reward and rank for maintaining family unity is great and fulfilling, similarly the warnings and sin for severing and breaking ties is equally detrimental.

Breaking Family Ties is a major sin which is so despised and hated in the eyes of Almighty Allah, that Allah has actually cursed the one severing family ties. A cursed person is one who is deprived of the mercy of Allah Ta’ala. This sin is punishable in this world as well as in the Hereafter.

We find this mentioned in two places in the Holy Quran.
وَٱلَّذِينَ يَنقُضُونَ عَهْدَ ٱللَّهِ مِنۢ بَعْدِ مِيثَـٰقِهِۦ وَيَقْطَعُونَ مَآ أَمَرَ ٱللَّهُ بِهِۦٓ أَن يُوصَلَ وَيُفْسِدُونَ فِى ٱلْأَرْضِ ۙ أُو۟لَـٰٓئِكَ لَهُمُ ٱللَّعْنَةُ وَلَهُمْ سُوٓءُ ٱلدَّارِ
And those who violate Allah’s covenant after it has been affirmed, break whatever ˹ties˺ Allah has ordered to be maintained, and spread corruption in the land—it is they who will be condemned and will have the worst abode. [Ar Rad 13: 25]

فَهَلْ عَسَيْتُمْ إِن تَوَلَّيْتُمْ أَن تُفْسِدُوا۟ فِى ٱلْأَرْضِ وَتُقَطِّعُوٓا۟ أَرْحَامَكُمْ
أُو۟لَـٰٓئِكَ ٱلَّذِينَ لَعَنَهُمُ ٱللَّهُ فَأَصَمَّهُمْ وَأَعْمَىٰٓ أَبْصَـٰرَهُمْ
Now what can be expected of you if you are put in authority, other than to do evil in the land and violate the ties of blood. These are the ones who Allah has condemned, deafening them and blinding their eyes. [Muhammed 47: 22,23]
All sins are detested and hated by Allah for which Allah has warned of punishments, however, it is not every sin that Allah curses the perpetrator. So when Allah curses somebody over a certain sin, you know that the sin is highly detested and disliked.

It is not only in the Holy Quran, but the Hadith also contains stern warnings for the one who cut off Family Ties.
مَا مِنْ ذَنْبٍ أَجْدَرُ أَنْ يُعَجِّلَ اللَّهُ لِصَاحِبِهِ الْعُقُوبَةَ فِي الدُّنْيَا مَعَ مَا يَدَّخِرُ لَهُ فِي الآخِرَةِ – مِنَ الْبَغْىِ وَقَطِيعَةِ الرَّحِمِ
“There is no sin more deserving that Allah hasten the punishment in this world, in addition to what is stored up for him in the Hereafter – than injustice and severing the ties of kinship.” [Tirmidhi]

The warning and punishment in this Hadith is very severe. Allah doesn’t only punish the person in the Hereafter, but the fact that Allah already starts punishing the person in this world, speaks volumes about the severity of this action.
“‏ لاَ يَدْخُلُ الْجَنَّةَ قَاطِعٌ ‏‏
The severer would not enter Paradise. [Muslim 2556]

قَالَ ابْنُ عُمَرَ قَالَ سُفْيَانُ يَعْنِي قَاطِعَ رَحِمٍ
Ibn Umar said that Sufyan (explained it as): One who severs the tie of kinship would not enter Paradise.
The Hadith is short but mind you the warning is very severe.