Agniveshyagrihyasutra 2.4.9.2

2.4.9.2

āpūryamāṇapakṣe puṇye nakṣatre brāhmaṇakanyā brāhmaṇavidhavā vā suprakṣāḷitapāṇipādā śuciḥ śuklamanārdramācchādya yatra kārpāsastiṣṭhati tatra gatvā pakaphalaṃ parigṛhya gomayena gocarmamātraṃ caturaśraṃ sthaṇḍilamupalipya tanmadhye yantraṃ pratiṣṭhāpya prāṅmukhī udaṅmukhī vā upaviśya uparyupari tantuṃ tatya na kadācana nīcaṃ karoti \

In the waxing fortnight, under an auspicious constellation, an unmarried Brahmin girl or a Brahmin widow, with hands and feet well washed, pure, wearing a clean, dry garment, goes where the cotton stands, takes a ripe fruit, smears a square sacrificial ground of the measure of a cow-hide with cow dung, sets up the spinning apparatus in its middle, sits facing east or north, and stretches the thread upward and upward, never making it low.