Skandapurana 3.3.6.60_31

3.3.6.60_31

satyaṃ bravīmi paralokahitaṃ bravīmi sāraṃ bravīmyupaniṣaddhṛdayaṃ bravīmi ..

I speak the truth, I speak what is beneficial for the other world, I speak the essence, I speak the heart of the Upaniṣads: / having obtained this fierce and unsubstantial saṃsāra, a living being's only essence is service to the lotus-feet of Īśvara.