The sacrifices ordained for Brahmanas consist in recitation, that for Kshatriyas consists in the destruction of (clean) animals for the satisfaction of the gods; that for Vaishyas consists in the rearing of crops and the kecp of domestic animals and that for Shudras in menial service of the three other castes.
आलम्भयज्ञाः क्षत्राश्च हविर्यज्ञा विशः स्मृताः। परिचारयज्ञाः शूद्राश्च जपयज्ञा द्विजातयः॥