The ruling on calling the Athan and the Iqamah in the Grave of the Deceased

Question :

What is the ruling on calling the Athan and the Iqamah in the grave of the deceased when placing him in it?

Answer:

There is no doubt that this is an innovation that Allâh has not revealed any authority for, because it has not been reported from the Messenger of Allâh or his Companions All good is in following them and traversing upon their path. This is as Allâh said:

"And the foremost to embrace Islam of the Muhajirun (those who migrated from Makkah to Al-Madinah) and the Ansar (the citizens of Al-Madinah who helped the Muhajirun) and also those who followed them exactly in goodness. Allah is pleased with them and they are pleased with Him."

And the Prophet said:
"Whoever introduces into this matter of ours that which is not of it, then it is rejected."

This Hadith's authenticity is agreed upon. In another wording of it, he said:
"Whoever does a deed that is not in accordance with our matter, then it is rejected."

Also, he used to say in the Khutbah of Jumu'ah:
"To proceed: Verily, the best of speech is the Book of Allah and the best guidance is the guidance of Muhammad (3). The worst of affairs are the newly invented matters, and every newly invented matter is an innovation and every innovation is a misgui- dance, "

Muslim recorded this in a Hadith of Jabir.
Source:
Ash-Shaykh Ibn Baz
Fatawa Islamiyah, Vol. 3 Pages 112-113