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We have heard, O Janardana, that inevitable is the dwelling for an unknown period in hell for those men in whose families the religious practices have been destroyed.

Janardana, we have heard it said that people whose family traditions are destroyed must dwell in hell for an unending time.

Arjuna supports his argument by appeal to what he has heard, the received teaching of elders and texts. Those whose family duties are destroyed, he says, are said to live in hell indefinitely. The phrase we have heard shows that he is relying on tradition rather than on his own insight. This becomes significant later, when Krishna will contrast received opinion with direct understanding. Here Arjuna gathers every authority he can, personal, social and scriptural, to justify the refusal his heart has already made.