IT IS MUSTAḤABB to engage in dhikr of Allah 
and to ponder what the deceased will encounter, what his destiny will be, and the consequences of what he was engaged in. One should consider that this is the last stage of this worldly life and the destiny of its inhabitants. One should be extremely careful to avoid worthless chatter, for this is a time for contemplation and dhikr and it is despicable to engage in forgetfulness, jest and vain talk. If vain talk is prohibited in all circumstances, is it not especially so in these?
and to ponder what the deceased will encounter, what his destiny will be, and the consequences of what he was engaged in. One should consider that this is the last stage of this worldly life and the destiny of its inhabitants. One should be extremely careful to avoid worthless chatter, for this is a time for contemplation and dhikr and it is despicable to engage in forgetfulness, jest and vain talk. If vain talk is prohibited in all circumstances, is it not especially so in these?Know that the rewarded and preferred opinion is that which the Salaf adhered to. Silence is preferred when travelling with the bier, so no-one should raise their voice in recitation, dhikr or anything else. The wisdom in this is apparent: it is soothing for the mind and rallies the thoughts to matters concerned with the burial, which is desirable in this situation. That is the reality. One should not be duped by the many who take a different way from him. Abū ‘Alī al-Fuḍayl ibn ‘Iyāḍ said: “Stick to the path of guidance. Do not be hurt by the fact that those who follow it and abstain from the path of error are few, and do not be deceived by the many who are ruined.”
And I have narrated in the Sunan of al-Bayhaqī things which support what I have said.
As for what some ignorant reciters of Qur’ān do for the janāzah in Damascus and other places, such as long passages of recitation, and long discussions about the person’s position, etc, then this is unlawful by ijmā‘ of the scholars. I have explained the reprehensibility of this practice, in addition to its serious prohibition and the sinfulness of failing to abstain from it, in the book Ādāb al-qurrā. And Allah is the only Helper.