SB 4.22.4
gauravad yantritah sabhyah
prasrayanata-kandharah
vidhivat pujayam cakre
grhitadhyarhanasanan
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
When the great sages accepted their reception, according to the instructions of the sastras, and finally took their seats offered by the King, the King, influenced by the glories of the sages, immediately bowed down. Thus he worshiped the four Kumaras.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
The four Kumaras are parampara spiritual masters of the Vaisnava sampradaya. Out of the four sampradayas, namely Brahma sampradaya, Sri sampradaya, Kumara sampradaya and Rudra sampradaya, the disciplic succession of spiritual master to disciple known as the Kumara sampradaya is coming down from the four Kumaras. So Prthu Maharaja was very respectful to the sampradaya-acaryas. As it is said by Srila Visvanatha Cakravarti Thakura, saksad-dharitvena samasta-sastraih: a spiritual master, or the parampara-acarya, should be respected exactly like the Supreme Personality of Godhead. The word vidhivat is significant in this verse. This means that Prthu Maharaja also strictly followed the injunctions of the sastra in receiving a spiritual master, or acarya, of the transcendental disciplic succession. Whenever an acarya is seen, one should immediately bow down before him. Prthu Maharaja did this properly; therefore the words used here are prasrayanata-kandharah: out of humility, he bowed down before the Kumaras.