The Great Epic of the Bhārata dynasty 1.188.8

1.188.8

na cāpyācaritaḥ pūrvairayaṃ dharmo mahātmabhiḥ |
na ca dharmo'pyanekasthaścaritavyaḥ sanātanaḥ || 8 ||

"Hearing these words of the Rishi, Drupada spoke first, saying, 'The practice is sinful in my opinion, being opposed to both usage and the Vedas. O best of Brahmanas, nowhere have I seen many men having one wife. The illustrious ones also of former ages never had such a usage amongst them. The wise should never commit a sin. I, therefore, can never make up mind to act in this way. This practice always appeareth to me to be of doubtful morality.