Mahabharata 8.23.50

यथाश्वहृदयं वेद वासुदेवो महामनाःद्विगुणं त्वं तथा वेत्थ मद्रराज न संशयः

yathāśvahṛdayaṃ veda vāsudevo mahāmanāḥdviguṇaṃ tvaṃ tathā vettha madrarāja na saṃśayaḥ

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