MPur, 47, 242.1 pañcamaḥ pañcadaśyāṃ ca tretāyāṃ saṃbabhūva ha /

TantraS, 6, 15.0 tatra kṛṣṇapakṣe prāṇārke apānacandra āpyāyikām ekām ekāṃ kalām arpayati yāvat pañcadaśyāṃ tuṭau dvādaśāntasamīpe kṣīṇapṛthagbhūtakalāprasaraḥ candramāḥ prāṇārka eva līyate //