Mahabharata 1.201.4

अन्योन्यस्य प्रियकरावन्योन्यस्य प्रियंवदौएकशीलसमाचारौ द्विधैवैकं यथा कृतौ

anyonyasya priyakarāvanyonyasya priyaṃvadauekaśīlasamācārau dvidhaivaikaṃ yathā kṛtau

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