بسم الله الرحمن الرحيم

Al-Allaamah Ash-Shaykh Saalih Al-Fawzaan:

Congregational Dua at the grave is an innovation,rather a person supplicates individually for the deceased and he does not join (his dua) with others.

Ash-Shaykh Fawzaan’s explanation of Ighaafatul Lahfaan 29-01-1438