Mahabharata 1.146.4

एतद्धि परमं नार्याः कार्यं लोके सनातनम्प्राणानपि परित्यज्य यद्भर्तृहितमाचरेत्

etaddhi paramaṃ nāryāḥ kāryaṃ loke sanātanamprāṇānapi parityajya yadbhartṛhitamācaret

Our plain-language meaning of this verse is waiting for scholar review.