The Vratas to be observed on Trayodaśī days

यदीयं शनिना युक्ता सा महावारुणी स्मृता। गङ्गायां यदि लभ्येत कोटिसूर्यग्रहाधिका।।

yadīyaṃ śaninā yuktā sā mahāvāruṇī smṛtā| gaṅgāyāṃ yadi labhyeta koṭisūryagrahādhikā||