Mahabharata 12.290.6

राक्षसान्विषयाञ्ज्ञात्वा यक्षाणां विषयांस्तथाविषयानौरगाञ्ज्ञात्वा गान्धर्वविषयांस्तथा

rākṣasānviṣayāñjñātvā yakṣāṇāṃ viṣayāṃstathāviṣayānauragāñjñātvā gāndharvaviṣayāṃstathā

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