One verse

Srimad Bhagavatam 4.21.18

4.21.18

व्यञ्जिताशेषगात्रश्रीर्नियमे न्यस्तभूषण: । कृष्णाजिनधर: श्रीमान् कुशपाणि:कृतोचित: ॥ १८ ॥

vyanjitasesa-gatra-srir niyame nyasta-bhusanah krsnajina-dharah sriman kusa-panih krtocitah

vyanjita
indicating
asesa
innumerable
gatra
bodily
srih
beauty
niyame
regulated
nyasta
given up
bhusanah
garments
krsna
black
ajina
skin
dharah
putting on
sriman
beautiful
kusa-panih
having kusa grass on the fingers
krta
performed
ucitah
as it is required.

As Maharaja Prthu was being initiated to perform the sacrifice, he had to leave aside his valuable dress, and therefore his natural bodily beauty was visible. It was very pleasing to see him put on a black deerskin and wear a ring of kusa grass on his finger, for this increased the natural beauty of his body. It appears that Maharaja Prthu observed all the regulative principles before he performed the sacrifice.