"However, discard the desire (kama) and material wealth (artha) if contrary to Dharma; as also, any usage or custom or rules regarded as source of Dharma if at any time they were to lead to unhappiness or arouse people's indignation. (Manu Smriti 4.176)

The Veda is the cow, the true Agama its milk.
— Umapati, Translated by David Smith