yatra - where; ha vāva - certainly; na - not; bhayam - fearfulness; ahaḥ-rātra-ādibhiḥ - because of days and nights; kāla-vibhāgaiḥ - the divisions of time; upalakṣyate - is experienced.

Since there is no sunshine in those subterranean planets, time is not divided into days and nights, and consequently fear produced by time does not exist.