Gāndharva-lakṣaṇa
Traits/Classification of the Gandharvas) and Royal-Genealogical Continuities (Vamśa-prasaṅga
उपांशुव्रतमास्थाय दीक्षां द्वादशवार्षिकीम् / पितुर्नियोगादभजन्नृपे तु वनमास्थिते
upāṃśuvratamāsthāya dīkṣāṃ dvādaśavārṣikīm / piturniyogādabhajannṛpe tu vanamāsthite
When the king had taken up residence in the forest, he—by his father’s command—undertook the upāṃśu vow and observed the twelve-year dīkṣā.