Srimad Bhagavatam Canto 04, Chapter 29, Text 81

SB 4.29.81

pracinabarhi rajarsih
adisya putran agamat
 tapase kapilasramam
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
In the presence of his ministers, the saintly King Pracinabarhi left orders for his sons to protect the citizens. He then left home and went off to undergo austerities in a holy place known as Kapilasrama.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
The word praja-sarga is very important in this verse. When the saintly King Pracinabarhi was induced by the great sage Narada to leave home and take to the devotional service of the Lord, his sons had not yet returned from their austerities in the water. However, he did not wait for their return but simply left messages to the effect that his sons were to protect the mass of citizens. According to Viraraghava Acarya, such protection means organizing the citizens into the specific divisions of the four varnas and four asramas. It was the responsibility of the royal order to see that the citizens were following the regulative principles of the four varnas (namely brahmana, ksatriya, vaisya and sudra) and the asramas (namely brahmacarya, grhastha, vanaprastha and sannyasa). It is very difficult to rule citizens in a kingdom without organizing this varnasrama-dharma. To rule the mass of citizens in a state and keep them in a complete progressive order is not possible simply by passing laws every year in a legislative assembly. The varnasrama-dharma is essential in a good government. One class of men (the brahmanas) must be intelligent and brahminically qualified, another class must be trained in administrative work (ksatriya), another in mercantile business (vaisya), and another simply in labor (sudra). These four classes of men are already there according to nature, but it is the government’s duty to see that all four of these classes follow the principles of their varnas methodically. This is called abhiraksana, or protection.
It is significant that when Maharaja Pracinabarhi was convinced of the goal of life through the instructions of Narada, he did not wait even a moment to see his sons return, but left immediately. There were many things to be done upon the return of his sons, but he simply left them a message. He knew what his prime duty was. He simply left instructions for his sons and went off for the purpose of spiritual advancement. This is the system of Vedic civilization.
Sridhara Svami informs us that Kapilasrama is located at the confluence of the Ganges and the Bay of Bengal, a place known now as Ganga-sagara. This place is still famous as a place of pilgrimage, and many millions of people gather there every year on the day of Makara-sankranti and take bath. It is called Kapilasrama because of Lord Kapila’s living there to perform His austerities and penances. Lord Kapila propounded the Sankhya system of philosophy.
Srimad Bhagavatam Canto 04, Chapter 29, Text 80
Srimad Bhagavatam Canto 04, Chapter 29, Text 82