What is the ruling on gathering at night to recite the Qur’an collectively, with the recitation divided between two groups, and repeating this for three nights after the death of a person, along with chewing qat during the recitation?

The aforementioned action involves several violations of the Sunnah (definition): gathering for condolences, reciting the Qur'an collectively, and dedicating specific surahs and verses for that purpose. Chewing khat is prohibited and becomes even more reprehensible when associated with the remembrance of Allah and the recitation of the Qur'an, as it gives the impression of not revering the Qur'an and not caring about it. This habit must be abandoned, and those who practice it should be advised by clarifying its violation of the Sunnah.