Bṛhaspati said: “Thus said the holy lord Aṅgiras to the sages. On being asked to clear their doubts he said to the sages in the assembly of men formerly in the extensive Satra (sacrifice) lasting a thousand years. In that Satra the Sadaspati (the Presiding Lord) was Brahmā the lord of Devas. Five thousand years have elapsed since then. In. this connection verses have been sung by the sages who expounded the Brahman.