Arjuna's chain of worry now reaches across the boundary between the living and the dead. He says: This disorder brings hell for those who destroy the family and for the family itself. Their ancestors fall from their place, because the rites of pinda and water — the offerings that sustain them — are no longer performed.
In Indian tradition, offering pinda (rice balls) and water to one's ancestors is a sacred duty. It is the way the living honour and sustain those who came before them. When a family is destroyed and there is no one left to perform these rites, the connection between the generations is severed — not just in this world, but in the next.
Arjuna's concern is deeply practical in the framework of his tradition. When a family falls apart, the memories, rites, and traditions that kept the ancestors alive in spirit are lost. The past is forgotten, and what was sacred becomes neglected.