The Ruling on Al-Jadaf

Question :

Some people among the families of the dead drive animals which they call Al-Jadaf for the dead to the graves in order to slaughter it there. Then they share it among those present at the grave. They slaughter it a hundred meters away from the grave. This Jadaf may be a sheep, a camel or a cow. I seek advice from Your Eminence, may Allah grant you success.

Answer:

Slaughtering at the graveside is forbidden and that which is known as Al-Jadaf, due to the intention to draw closer (to the deceased) and the act of worship entailed by it and the Prophet ﷺ cursed:
"whomsoever slaughters for other than Allah."

As for the family of the deceased making food for those who attend, it is not a part of the Sunnah. The Sunnah is only for food to be prepared for them (i.e., the kin of the deceased), according to what has been confirmed from the order of the Prophet ﷺ to prepare food for the family of Ja'far when they were mourning him after he was killed may Allah be pleased with him. And may peace and blessings be upon our Prophet, Muhammad .

Source:
The Permanent Committee
Fatawa Islamiyah, Vol. 6 Pages 275-276