SB 1.12.4

sūta uvāca
apīpalad dharma-rājaḥ
 pitṛvad rañjayan prajāḥ
niḥspṛhaḥ sarva-kāmebhyaḥ
 kṛṣṇa-pādānusevayā
Synonyms: 
sūtaḥ uvāca — Śrī Sūta Gosvāmī said; apīpalat — administered prosperity; dharma-rājaḥ — King Yudhiṣṭhira; pitṛ-vat — exactly like his father; rañjayan — pleasing; prajāḥ — all those who took birth; niḥspṛhaḥ — without personal ambition; sarva — all; kāmebhyaḥ — from sense gratification; kṛṣṇa-pāda — the lotus feet of Lord Śrī Kṛṣṇa; anusevayā — by dint of rendering continuous service.
Translation: 
Śrī Sūta Gosvāmī said: Emperor Yudhiṣṭhira administered generously to everyone during his reign. He was exactly like his father. He had no personal ambition and was freed from all sorts of sense gratification because of his continuous service unto the lotus feet of the Lord Śrī Kṛṣṇa.
Purport: 

As mentioned in our introduction, “There is a need for the science of Kṛṣṇa in human society for all the suffering humanity of the world, and we simply request the leading personalities of all nations to take to the science of Kṛṣṇa for their own good, for the good of society, and for the good of all the people of the world.” So it is confirmed herein by the example of Mahārāja Yudhiṣṭhira, the personality of goodness. In India the people hanker after Rāma-rājya because the Personality of Godhead was the ideal king and all other kings or emperors in India controlled the destiny of the world for the prosperity of every living being who took birth on the earth. Herein the word prajāḥ is significant. The etymological import of the word is “that which is born.” On the earth there are many species of life, from the aquatics up to the perfect human beings, and all are known as prajās. Lord Brahmā, the creator of this particular universe, is known as the prajāpati because he is the grandfather of all who have taken birth. Thus prajā is used in a broader sense than it is now used. The king represents all living beings, the aquatics, plants, trees, reptiles, birds, animals and man. Every one of them is a part and parcel of the Supreme Lord (Bg. 14.4), and the king, being the representative of the Supreme Lord, is duty-bound to give proper protection to every one of them. This is not the case with the presidents and dictators of this demoralized system of administration, where the lower animals are given no protection while the higher animals are given so-called protection. But this is a great science which can be learned only by one who knows the science of Kṛṣṇa. By knowing the science of Kṛṣṇa, one can become the most perfect man in the world, and unless one has knowledge in this science, all qualifications and doctorate diplomas acquired by academic education are spoiled and useless. Mahārāja Yudhiṣṭhira knew this science of Kṛṣṇa very well, for it is stated here that by continuous cultivation of this science, or by continuous devotional service to Lord Kṛṣṇa, he acquired the qualification of administering the state. The father is sometimes seemingly cruel to the son, but that does not mean that the father has lost the qualification to be a father. A father is always a father because he always has the good of the son at heart. The father wants every one of his sons to become a better man than himself. Therefore, a king like Mahārāja Yudhiṣṭhira, who was the personality of goodness, wanted everyone under his administration, especially human beings who have better developed consciousness, to become devotees of Lord Kṛṣṇa so that everyone can become free from the trifles of material existence. His motto of administration was all good for the citizens, for as personified goodness he knew perfectly well what is actually good for them. He conducted the administration on that principle, and not on the rākṣasī, demonic, principle of sense gratification. As an ideal king, he had no personal ambition, and there was no place for sense gratification because all his senses at all times were engaged in the loving service of the Supreme Lord, which includes the partial service to the living beings, who form the parts and parcels of the complete whole. Those who are busy rendering service to the parts and parcels, leaving aside the whole, only spoil time and energy, as one does when watering the leaves of a tree without watering the root. If water is poured on the root, the leaves are enlivened perfectly and automatically, but if water is poured on the leaves only, the whole energy is spoiled. Mahārāja Yudhiṣṭhira, therefore, was constantly engaged in the service of the Lord, and thus the parts and parcels of the Lord, the living beings under his careful administration, were perfectly attended with all comforts in this life and all progress in the next. That is the way of perfect management of state administration.