The Shulbasutras of Baudhayana, Apastamba, Katyayana and Manava: With Text, English Translation and Commentary c8.t3.28

c8.t3.28

*Uparavas* are sounding holes dug out in the ground near the *havirdhāna*. The *soma* plants are ground over this hole, emitting the sound of the grinding stone, which gave it the name. The exact location of these sounding holes is not clear. The *Śatapatha Brāhmaṇa* says: ‘He digs just beneath the fore-part of the shafts of the southern cart.’a Karavinda says that the *uparavas* are located in the south-west corner of the southern part of the cart-shed,—*dakṣiṇahavirdhānasya dakṣiṇāśronyāmu-paravāḥ*.