Vaikhanasasmartasutra 1.1.8

1.1.8

athāgnyāyatanaṃ prākpravaṇe vottarapravaṇe vā śuddhe deśe gomayenopalipte śuddhābhiḥ sikatābhiḥ prākpaścimaṃ dakṣiṇottaraṃ ca dvātriṃśadaṅgulyāyataṃ dvyaṅgulonnataṃ yathālābhonnataṃ vā sthaṇḍilamagnyāyatanaṃ bhavati paristaraṇabarhiṣaḥ pratidik pañcadaśa sthaṇḍilapramāṇāḥ kuṇḍe ṣaṭtriṃśadaṅgulāstathaikāṅgulipariṇāhā vraṇavakrahīnāḥ paridhayaḥ pañcadaśadarbhairgrathitaṃ caturaṅgulāgraṃ dvyaṅgulagranthi hastamātraṃ prokṣaṇakūrcaṃ tathaiva dvādaśāṅgulamātraṃ pavitraṃ tatpramāṇā yājñikāḥ samidhaḥ pātrasruvādayo yajñe proktā darbheṣu dvandvaṃ pātrādisaṃbhārānuttare daivike pratyekaṃ dakṣiṇataḥ paitṛke saṃbharati nityahome 'gniśālāyāṃ mṛdā caturdiśaṃ dvātriṃśadaṅgulyāyatāṃ caturaṅgulavistārāṃ dvyaṅgulonnatāmūrdhvavediṃ caturaṅgulivistāronnatāṃ tatparigatāmadhovediṃ ca madhye nimnaṃ ṣaḍaṅgulamagnikuṇḍaṃ kṛtvāsmin gṛhastho 'gnimaupāsanamādhāya nityaṃ juhoti vanasthasya śrāmaṇakāgreḥ kuṇḍamādhānaviśeṣaṃ ca dharme vakṣyāmaḥ \8\