TantraS, Trayodaśam āhnikam, 19.0 tatra citprakāśa eva madhyaṃ tata itarapravibhāgapravṛtteḥ prakāśasvīkāryam ūrdhvam atathābhūtam adhaḥ prakāśanasammukhīnaṃ pūrvam itarat aparam saṃmukhībhūtaprakāśatvāt anantaraṃ tatprakāśadhārārohasthānaṃ dakṣiṇam ānukūlyāt tatsammukhaṃ tu avabhāsyatvāt uttaram iti dikcatuṣkam //