 नूनं व्याकरणं कृत्स्नमनेन बहुधा श्रुतम्।बहु व्याहरताऽनेन न किञ्चिदपशब्दित।। 
 Surely, he seems to have studied well the whole of grammar, for there is not a single mispronunciation in his entire speech. 