Obligation of maintaining the ties of kinship and prohibition of severing them
A:
Maintaining the ties of kinship is obligatory and severing them is forbidden. Allah (Exalted be He) says,
Would you then, if you were given the authority, do mischief in the land, and sever your ties of kinship?
Such are they whom Allâh has cursed, so that He has made them deaf and blinded their sight.
You have to visit your grandmother and your father must offer a Kaffarah (expiation) for the oath that he took. The Kaffarah is to feed or clothe ten poor people or manumit a believing slave; if this is not available, he will have to fast for three days. It is not permissible to repay abandonment with abandonment. It is related by Al-Bukhari and others on the authority of `Abdullah ibn `Amr (may Allah be pleased with them both) who narrated that he heard the Messenger of Allah (peace be upon him) saying,
Al-Wasil (who maintains the ties of kinship) is not someone who repays the good done to them; this is someone who keeps good relations with those who severed the ties of kinship with them.
(Part No. 25; Page No. 293) May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.