Mahabharata 5.41.8
वैशंपायन उवाच · vaiśaṃpāyana uvāca
चिन्तयामास विदुरस्तमृषिं संशितव्रतम्स च तच्चिन्तितं ज्ञात्वा दर्शयामास भारत
cintayāmāsa vidurastamṛṣiṃ saṃśitavratamsa ca taccintitaṃ jñātvā darśayāmāsa bhārata
Our plain-language meaning of this verse is waiting for scholar review.