Rudra-prasava-varṇana
The Manifestation and Naming of Rudra / Nīlalohita
अमावास्यानिशायां तु तस्यां युक्तः सादा भवेत् / रुद्राविष्टं सर्वमिदं तनुभिर्न्नामभिश्च ह
amāvāsyāniśāyāṃ tu tasyāṃ yuktaḥ sādā bhavet / rudrāviṣṭaṃ sarvamidaṃ tanubhirnnāmabhiśca ha
On that night of Amāvāsyā one should ever remain disciplined and composed. All this is pervaded by Rudra—by his forms and by his names.