Bhagavatapurana 6.8.22

6.8.22

śrīvatsadhāmāpararātra īśaḥ pratyūṣa īśo 'sidharo janārdanaḥ /
dāmodaro 'vyādanusandhyaṃ prabhāte viśveśvaro bhagavān kālamūrtiḥ //

22. May the Supreme Ruler of Srivatsa mark protect me in the latter part of the night and Janardana the Supreme Ruler bearing the sword protect me about the dawn. May Damodara the one Lord of the Universe guard me at those points of time when day and night meet. May the glorious Lord (Vishnu) in the form of Time protect me in the early morning hours (at sunrise)!