One verse

Srimad Bhagavatam 5.18.34

5.18.34

उत्तरेषु च कुरुषु भगवान् यज्ञपुरुष: कृतवराहरूप आस्ते तं तु देवी हैषा भू: सह कुरुभिरस्खलितभक्तियोगेनोपधावति इमां च परमामुपनिषदमावर्तयति ॥ ३४ ॥

uttaresu ca kurusu bhagavan yajna-purusah krta-varaha-rupa aste tam tu devi haisa bhuh saha kurubhir askhalita-bhakti-yogenopadhavati imam ca paramam upanisadam avartayati.

uttaresu
on the northern side
ca
also
kurusu
in the tract of land known as Kuru
bhagavan
the Supreme Personality of Godhead
yajna-purusah
who accepts all results of sacrifices
krta-varaha-rupah
having accepted the form of a boar
aste
exists eternally
tam
Him
tu
certainly
devi
the goddess
ha
certainly
esa
this
bhuh
planet earth
saha
along with
kurubhih
the inhabitants of the land known as Kuru
askhalita
unfailing
bhakti-yogena
by devotional service
upadhavati
worship
imam
this
ca
also
paramam upanisadam
the supreme Upanisad (the process by which one can approach the Lord)
avartayati
chants again and again for the purpose of practice

Sukadeva Gosvami said: Dear King, the Supreme Lord in His boar incarnation, who accepts all sacrificial offerings, lives in the northern part of Jambudvipa. There, in the tract of land known as Uttarakuru-varsa, mother earth and all the other inhabitants worship Him with unfailing devotional service by repeatedly chanting the following Upanisad mantra.