The Richs, the yajuses and the Samans depend on the body. They flow from the end of the tongue. They cannot be acquired without exertion and are subject to destruction.
ऋचो यजूंषि सामानि शरीराणि व्यपाश्रिताः। जिह्वाग्रेषु प्रवर्तन्ते यत्नसाध्या विनाशिनः॥