sa tvaṁ vidhatsva śaṁ bhūmaṁs
saḥ—he; tvam—you; vidhatsva—perform; śam—good fortune; bhūman—O great lord; tamasā—by the darkness; lupta—have been suspended; karmaṇām—of prescribed duties; adabhra—magnanimous, without reservation; dayayā—mercy; dṛṣṭyā—by your glance; āpannān—us, the surrendered; arhasi—are able; īkṣitum—to see.
The demigods prayed to Brahmā: Please look upon us mercifully, for we have fallen into a miserable condition; because of the darkness, all our work has been suspended.
Because of complete darkness throughout the universe, the regular activities and engagements of all the different planets were suspended. In the North and South Poles of this planet there are sometimes no divisions of day and night; similarly, when the sunlight does not approach the different planets within the universe, there is no distinction between day and night.
Link to this page: https://prabhupadabooks.com/sb/3/15/9