Mahabharata 12.208.12

स दुःखं प्राप्य लोकेऽस्मिन्नरकायोपपद्यतेतस्मान्मनोवाक्शरीरैराचरेद्धैर्यमात्मनः

sa duḥkhaṃ prāpya loke'sminnarakāyopapadyatetasmānmanovākśarīrairācareddhairyamātmanaḥ

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