Mahabharata 3.199.1

मार्कण्डेय उवाच · mārkaṇḍeya uvāca

स तु विप्रमथोवाच धर्मव्याधो युधिष्ठिरयदहं ह्याचरे कर्म घोरमेतदसंशयम्

sa tu vipramathovāca dharmavyādho yudhiṣṭhirayadahaṃ hyācare karma ghorametadasaṃśayam

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