Mahabharata 13.130.43
अग्नियोगवहो ग्रीष्मे विधिदृष्टेन कर्मणाचीर्त्वा द्वादश वर्षाणि राजा भवति पार्थिवः
agniyogavaho grīṣme vidhidṛṣṭena karmaṇācīrtvā dvādaśa varṣāṇi rājā bhavati pārthivaḥ
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book