Breaking up relations
The seventh Greater Sin is Qat’a ar-Rahm, the breaking up of relations with one’s kith and kin. This is clearly verified by Imam Ja’far as-Sadiq (a.s.) as well as Imam Musa al-Kadhim (a.s.), Imam ‘Ali ar-Riďa (a.s.) and Imam Muhammad al-Taqi (a.s.). The Qur’an has also decreed Hell-fire and the curse of Allah (S.w.T.) upon those who cut off ties with their relatives.
Imam Ja’far as-Sadiq (a.s.) says:
“Beware of those who cut off relations because I have found them cursed thrice in the Qur’an.”
1) Whoever break the covenant of Allah after its confirmation and cut asunder what Allah has ordered to be joined, and make mischief in the land, these it is that are the losers. (Surah al-Baqarah, 2:27)
In the Qur’anic terminology when the word Khāsir (loser) is used it denotes the one who is to be in loss, or rather the one who is cursed.