Mahabharata 3.295.6

ब्राह्मणार्थे पराक्रान्ता धर्मात्मानो यतव्रताःक्लेशमार्छन्त विपुलं सुखोदर्कं परंतपाः

brāhmaṇārthe parākrāntā dharmātmāno yatavratāḥkleśamārchanta vipulaṃ sukhodarkaṃ paraṃtapāḥ

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