The Religion and Philosophy of the Veda and Upanishads v2.c30.s1.7

v2.c30.s1.7

In the Sūtras the principle is laid down that the sacrifices are to be distinguished as Prakṛtis and Vikṛtis, the former being the base on which the later are built up; thus the new- and full-moon sacrifices are the model for other sacrifices of the type known as Iṣṭi, and for the animal sacrifice, in its form as an offering to Agni and Soma, on which further animal offerings are based. The Agniṣṭoma again is the fundamental form of the Soma sacrifice: