SB 5.20.34
tatah parastal lokaloka-namacalo lokalokayor antarale parita upaksiptah.
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Thereafter, beyond the ocean of sweet water and fully surrounding it, is a mountain named Lokaloka, which divides the countries that are full of sunlight from those not lit by the sun.