AYURVEDIYAPARIBHAShA 9.17

ĀYURVEDĪYAPARIBHĀṢĀ 9.17

ūrdhvamukhaiḥ śilāputraiḥ śilāyāṃ kṣādayed yadi
tadā dviguṇavīryaṃ syādīśānābhimukho yadi