Is it permissible to say R.I.P. for a deceased non-Muslim? Will the ruling be changed if the deceased is a relative?
R.I.P. effectively is a dua for the deceased. Muslims have been prohibited from making dua for those who have passed away on kufr. Therefore, it will not be permissible to say r.i.p. for non-Muslims, whether the deceased is a relative or a friend or someone else.i
