The Great Epic of the Bhārata dynasty 1.188.10

1.188.10

dhṛṣṭadyumna uvāca |
yavīyasaḥ kathaṃ bhāryāṃ jyeṣṭho bhrātā dvijarṣabha |
brahmansamabhivarteta sadvṛttaḥ saṃstapodhana || 10 ||

"After Drupada had ceased, Dhrishtadyumna spoke, saying 'O bull amongst Brahmanas, O thou of ascetic wealth, how can, O Brahmana, the elder brother, if he is of a good disposition, approach the wife of his younger brother? The ways of morality are ever subtle, and, therefore, we know them not. We cannot, therefore, say what is conformable to morality and what not. We cannot do such a deed, therefore, with a safe conscience. Indeed, O Brahmana, I cannot say, 'Let Draupadi become the common wife of five brothers.'