May Madhusūdana, who carries a bow very fearful for the demons, protect me during the fifth part of the day. In the evening, the sixth part of the day, may Mādhava, who is eternity, knowledge and bliss, protect me, and during pradoṣa may Hṛṣīkeśa protect me. May Padmanābha alone protect me during ārdha-ratra and niśītha. Aparāhna lasts from the twenty-first ghaṭikā to the twenty-fifth ghaṭikā. Sāyam or evening lasts from the twenty-sixth ghaṭikā to the thirtieth ghaṭikā. Tri-dhāmā means the Lord with three forms: eternity, knowledge and bliss. Having recited mantras for protection during the day divided into six parts, he now recites mantras for protection during the five parts of the night. Doṣa or pradoṣa lasts till the end of the fourth ghaṭikā of the night. From the fifth to the fourteen ghaṭikā is ardharātra (midnight), since midnight is included in it. The fifteenth and sixteenth ghaṭikās are niśītha.