ĀK, 1, 21, 44.2 idaṃ hi mātṛkāyantraṃ viṣamṛtyugadāpaham //

Paraśurāmakalpasūtra, 1, 38.1 śivayuksauvarṇakarṇike svaradvandvajuṣṭakiñjalkāṣṭake kacaṭatapayaśalākṣaravargāṣṭayuktāṣṭadale digaṣṭakasthita ṭhaṃ vaṃ caturaśre mātṛkāyantre śiṣyaṃ niveśya tena kumbhāmbhasā tisṛbhiḥ vidyābhiḥ snapayet //