Cyavana’s Water-Vow and the Ethics of Cohabitation (स्नेह-सम्वास-धर्मः)
शूद्रां शयनमारोप्य ब्राह्मणो यात्यधोगतिम् । प्रायश्षित्तीयते चापि विधिदृष्टेन कर्मणा
śūdrāṁ śayanam āropya brāhmaṇo yāty adhogatim | prāyaścittīyate cāpi vidhidṛṣṭena karmaṇā ||
Bhīṣma dit : «Si un brāhmaṇa place une femme Śūdra sur son lit (c’est-à-dire s’il s’adonne à une union charnelle interdite), il tombe en un état inférieur. Pourtant, il peut aussi être purifié par l’expiation, en accomplissant le rite prescrit selon la règle.»
भीष्म उवाच
The verse states that violating prescribed sexual boundaries (a brāhmaṇa taking a śūdra woman to bed) is a serious dharmic transgression leading to moral/spiritual decline, but it also affirms the dharma-śāstric principle that such faults can be addressed through properly prescribed prāyaścitta (expiatory rites).
In Anuśāsana Parva, Bhīṣma instructs Yudhiṣṭhira on dharma, including social and ritual norms. Here he gives a rule-and-remedy formulation: he names a prohibited act and then notes that purification is possible through the expiation laid down by scriptural injunction.