Bhagavatapurana 5.21.4

5.21.4

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yadā meṣa-tulayor vartate tadāho-rātrāṇi samānāni bhavanti yadā vṛṣabhādiṣu pañcasu ca rāśiṣu carati tadāhāny eva vardhante hrasati ca māsi māsy ekaikā ghaṭikā rātriṣu //

4. When he traverses the signs of the Goat and the Balance days and nights are of equal length; and when he traverses the five signs commencing with the Bull, days become longer, and nights shorter every month by an hour (of 24 minutes).