May Lord Madhusūdana, who carries a bow very fearful for the demons, protect me during the fifth part of the day. In the evening, may Lord Mādhava, appearing as Brahmā, Viṣṇu and Maheśvara, protect me, and in the beginning of night may Lord Hṛṣīkeśa protect me. At the dead of night [in the second and third parts of night] may Lord Padmanābha alone protect me.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
देवोऽपराह्णे मधुहोग्रधन्वा सायं त्रिधामावतु माधवो माम् । दोषे हृषीकेश उतार्धरात्रे निशीथ एकोऽवतु पद्मनाभः
devo'parāhṇe madhuhogradhanvā sāyaṃ tridhāmāvatu mādhavo mām | doṣe hṛṣīkeśa utārdharātre niśītha eko'vatu padmanābhaḥ
SB 6.8.21