favours done to a vile fellow would be lost and go unreciprocated

 

कृतशतमसत्सु नष्टं सुभाषितशतं च नष्टमबुधेषु।

वचनशतमवचनकरे बुद्धिशतमचेतने नष्टम्॥

इन्दिश्चे स्प्रूचे ७१४ पञ्चतन्त्रे

kṛtaśatamasatsu naṣṭaṁ subhāṣitaśataṁ ca naṣṭamabudheṣu|

vacanaśatamavacanakare buddhiśatamacetane naṣṭam||

indiśce sprūce 714 pañcatantre

Even a hundred favours done to a vile fellow would be lost and go unreciprocated. Even if you make hundred speeches, or quote hundred subhashitams to a fool, that will have no effect. Hundred of instructions, warnings or reprimands will have no effect on an adamant person. And advices, demonstrations and illustrations attempted hundreds of times on a moron and idiot are of no use.