Mahabharata 13.90.33
तस्मात्सर्वप्रयत्नेन परीक्ष्यामन्त्रयेद्द्विजान्स्वकर्मनिरतान्दान्तान्कुले जातान्बहुश्रुतान्
tasmātsarvaprayatnena parīkṣyāmantrayeddvijānsvakarmaniratāndāntānkule jātānbahuśrutān
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book