Mahabharata 3.38.1
वैशंपायन उवाच · vaiśaṃpāyana uvāca
कस्यचित्त्वथ कालस्य धर्मराजो युधिष्ठिरःसंस्मृत्य मुनिसंदेशमिदं वचनमब्रवीत्
kasyacittvatha kālasya dharmarājo yudhiṣṭhiraḥsaṃsmṛtya munisaṃdeśamidaṃ vacanamabravīt
Our plain-language meaning of this verse is waiting for scholar review.