Mahabharata 13.16.48

ऋग्भिर्यमनुशंसन्ति तन्त्रे कर्मणि बह्वृचःयजुर्भिर्यं त्रिधा वेद्यं जुह्वत्यध्वर्यवोऽध्वरे

ṛgbhiryamanuśaṃsanti tantre karmaṇi bahvṛcaḥyajurbhiryaṃ tridhā vedyaṃ juhvatyadhvaryavo'dhvare

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