It should be known that only that sacrificial offering which was gained by fair means can please the deities. There are abundant proofs in the scriptures that the adoration of the gods may be done with bows, with libations poured on the fire, with recitation or changing of the Vedas, and with plants and herbs.
यदेव सुकृतं हव्यं तेन तुष्यन्ति देवताः। नमस्कारेण हविषा स्वाध्यायैरौषधैस्तथा॥