Question 468: Here in Ouargla, when someone dies, his family slaughters one of their sheep on the next day. What is the ruling on this? Does the reward of slaughtering it reach the deceased? What are the things that benefit the deceased?
Answer: Slaughtering for the deceased after burial is an act of Bidd`ah (innovation in religion) for which there is no evidence in the Qur’aan and the Sunnah. Taking the price of the slaughtered sheep from the property of the deceased is doing injustice to the heirs and is an unjust consumption of people’s money. Its reward will not be credited to the deceased as it is unlawful, and its price is unlawful too. According to evidence, what benefits the deceased is making Du`aa’ (supplication), giving Sadaqah (voluntary charity), and performing Hajj or `Umrah on their behalf... read more here.