Mahārāja Vena went astray from the path of righteousness, and the brāhmaṇas chastised him by the thunderbolt curse. By this King Vena was burnt with his good deeds and opulence and was en route to hell. The Lord, by His causeless mercy, descended as his son, by the name of Pṛthu, delivered the condemned King Vena from hell, and exploited the earth by drawing all kinds of crops as produce.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
यद्वेनमुत्पथगतं द्विजवाक्यवज्र- विप्लुष्टपौरुषभगं निरये पतन्तम् । त्रात्वार्थितो जगति पुत्रपदं च लेभे दुग्धा वसूनि वसुधा सकलानि येन
yadvenamutpathagataṃ dvijavākyavajra- vipluṣṭapauruṣabhagaṃ niraye patantam | trātvārthito jagati putrapadaṃ ca lebhe dugdhā vasūni vasudhā sakalāni yena
SB 2.7.9