अग्निनिचयः (Agninichaya) / The Accumulation of Sacred Fire & the Classification of Pitṛs by Time-Order
स रुद्रो वत्सर स्तेषां विज्ञेयो नीललोहितः / सतत्त्वं तस्य वक्ष्यमि कीर्त्यमानं निबोधत
sa rudro vatsara steṣāṃ vijñeyo nīlalohitaḥ / satattvaṃ tasya vakṣyami kīrtyamānaṃ nibodhata
Among them, that Rudra is to be known as Vatsara—know him as Nīlalohita. I shall speak of his true nature; understand what is sung in praise.