Srimad-Bhagavatam: Canto 5 - Chapter 1 - Verse 34
Sanskrit:
ऋषिरुवाचतत: परस्ताल्लोकालोकनामाचलो लोकालोकयोरन्तराले परित उपक्षिप्त: ॥ ३४ ॥
ITRANS:
tataḥ parastāl lokāloka-nāmācalo lokālokayor antarāle parita upakṣiptaḥ.
Translation:
Thereafter, beyond the ocean of sweet water and fully surrounding it, is a mountain named Lokāloka, which divides the countries that are full of sunlight from those not lit by the sun.