Sri Lakshmi Narayana Hrudayam audio, sung by Mrs. Nagamani Sathish. This great prayer has two distinct parts viz Narayana Hrudayam and Lakshmi Hrudayam and occurs in a book called Atharva Rahasya (The secret Atharva). For thousands of years this great prayer was kept as extremely secret as the prayer itself tells that it should not be taught indiscriminately.