One verse

Srimad Bhagavatam 5.20.16

5.20.16

यासां पयोभि: कुशद्वीपौकस: कुशलकोविदाभियुक्तकुलकसंज्ञा भगवन्तं जातवेदसरूपिणं कर्मकौशलेन यजन्ते ॥ १६ ॥

yasam payobhih kusadvipaukasah kusala-kovidabhiyukta-kulaka-samjna bhagavantam jataveda-sarupinam karma-kausalena yajante.

yasam
of which
payobhih
by the water
kusa-dvipa-okasah
the inhabitants of the island known as Kusadvipa
kusala
Kusala
kovida
Kovida
abhiyukta
Abhiyukta
kulaka
Kulaka
samjnah
named
bhagavantam
unto the Supreme Personality of Godhead
jataveda
the demigod of fire
sa-rupinam
manifesting the form
karma-kausalena
by expertise in ritualistic ceremonies
yajante
they worship.

The inhabitants of the island of Kusadvipa are celebrated as the Kusalas, Kovidas, Abhiyuktas and Kulakas. They are like the brahmanas, ksatriyas, vaisyas and sudras respectively. By bathing in the waters of those rivers, they all become purified. They are expert in performing ritualistic ceremonies according to the orders of the Vedic scriptures. Thus they worship the Lord in His aspect as the demigod of fire.