Is it permissible to accompany a funeral with Tahlil (saying: "La ilaha illa Allah [There is no God except Allah]") and to say Adhan (call to prayer)
after putting the dead person in Lahd (a crevice on the side of a grave facing the direction faced for Prayer)?
It was not authentically reported that the Prophet (peace be upon him) accompanied a funeral with Tahlil or Adhan after putting the dead person in the Lahd. It was not authentically reported, according to our knowledge, that any of the Companions (may Allah be pleased with them) did so. Therefore, doing so is a rejected Bid`ah (innovation in religion). The prophet (peace be upon him) said: (Part No. 9; Page No. 23)
Anyone who does an action which is not stated in this matter of ours (Islam) will have it rejected.
May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.