यां तां कथयितुं जातिं राम राजससात्त्विकीम् ।मनोवीर्यविचारार्थं प्रस्तुतोऽस्मीह तां श्रृणु
In plain words
That jāti — that kind of birth, compounded of rajas and sattva — which I have now undertaken to tell you, Rāma, for the sake of inquiry into the power of the mind: hear it.