Q 1: What is the ruling on
Du`a' (supplication) for a deceased person nearby his grave at the time of his burial, with those attending the funeral saying "Amen!" upon hearing the Du`a' said by one of them?
What is the Shar`y (Islamically lawful) formula of Du`a' following his burial? Where should the person supplicating Allah for the deceased stand in relation to the grave?
(Part No. 7; Page No. 378
It is recommended upon burying a deceased person to stand by his grave, implore Allah's Forgiveness for him, and ask Allah to make him steadfast when being questioned in the grave, since the Prophet Muhammad (peace and blessings of Allah be upon him) said to his Sahabah (Companions of the Prophet) upon burying some deceased people:
Seek forgiveness for your dead brother, and implore Allah to grant him steadfastness, for he will now be questioned .
However, Du`a' should be said neither collectively nor with one saying it and the others saying "Amen!", since neither of them was reported from acts of the Prophet Muhammad. Rather, everyone should make Du`a' for the deceased individually. It does not matter whether they are standing to the right or to the left side of the grave, or even in front of it or behind it.