SB 1.19.11
anye ca devarsi-brahmarsi-varya
rajarsi-varya arunadayas ca
nanarseya-pravaran sametan
abhyarcya raja sirasa vavande
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
There were also many other saintly demigods, kings and special royal orders called arunadayas [a special rank of rajarsis] from different dynasties of sages. When they all assembled together to meet the Emperor [Pariksit], he received them properly and bowed his head to the ground.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
The system of bowing the head to the ground to show respect to superiors is an excellent etiquette which obliges the honored guest deep into the heart. Even the first-grade offender is excused simply by this process, and Maharaja Pariksit, although honored by all the rsis and kings, welcomed all the big men in that humble etiquette in order to be excused from any offenses. Generally at the last stage of one’s life this humble method is adopted by every sensible man in order to be excused before departure. In this way Maharaja Pariksit implored everyone’s good will for going back home, back to Godhead.