Agniveshyagrihyasutra 2.4.8.2

2.4.8.2

grāmāt prācīmudīcīṃ diśamupaniṣkramya gomayena gocarmamātraṃ caturaśraṃ sthaṇḍilamupalipya prokṣya lakṣaṇamullikhyādbhiravokṣya pradakṣiṇaṃ vāyasānāmāsanaṃ kalpayati \

Having gone out from the village in an eastern or northern direction, having smeared a square sacrificial ground measuring a cow-hide with cow-dung, having sprinkled it, having drawn the marks, and having sprinkled it all over with water, he arranges clockwise a seat for the crows: