Mahabharata 12.256.22

वाग्वृद्धं त्रायते श्रद्धा मनोवृद्धं च भारतयथौपम्योपदेशेन किं भूयः श्रोतुमिच्छसि

vāgvṛddhaṃ trāyate śraddhā manovṛddhaṃ ca bhāratayathaupamyopadeśena kiṃ bhūyaḥ śrotumicchasi

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