Rudra-prasava-varṇana
The Manifestation and Naming of Rudra / Nīlalohita
ततो ऽब्रवीत्पुनर्ब्रह्मा कुमारं नीललोहितम् / ईशानेति चतुर्थ ते नाम प्रोक्तं मयेह यत्
tato 'bravītpunarbrahmā kumāraṃ nīlalohitam / īśāneti caturtha te nāma proktaṃ mayeha yat
Then Brahmā spoke again to the youth Nīlalohita: “Īśāna”—this is the fourth name of yours that I have proclaimed here.