For 10 points, name these Sanskrit texts which serve as the foundation for Hindu doctrine, the oldest of which is the Rig.
One early extension of these texts includes the Panchavimsha. Each of these texts contains a set of doctrines meant to be studied in a deserted forest, known as the "Book of the Wilderness." The "going of the cows" ceremony is described in the aforementioned extension of these. Each of them is broken up into a collection of hymns, a Samhita; and exegetical sections including the Brahmana. This set of works is grouped into the "threefold knowledge" and the last part, the Atharva one. The main portion of these texts is extended in the Upanishads. For 10 points, name these Sanskrit texts which serve as the foundation for Hindu doctrine, the oldest of which is the Rig.
One early extension of these texts includes the Panchavimsha.
Vedas