Raising the voice during a funeral
Question

                When following a funeral cortege some people raise their voices and ask the people to say Laa ilaaha ill-Allaah (there is no god except Allaah) or Allaahu akbar (Allaah is Most Great). What is the ruling on that?.
Praise be to Allah.
    This is a reprehensible action for which there is no basis in 
    the pure sharee’ah. Rather what is prescribed when following a funeral 
    cortege is to remember the Hereafter and death, and to pray for forgiveness 
    and mercy for the deceased, without raising one's voice. Qays ibn ‘Abbaad, 
    the great Taabi’i (may Allaah have mercy on him) said: The Companions of the Messenger of Allaah  (peace and blessings of Allaah be upon him) used to dislike (loud) voices on three occasions: at funerals, when reciting dhikr and when fighting.