Rudra-prasava-varṇana
The Manifestation and Naming of Rudra / Nīlalohita
द्वितीयं नामधेयं ते मया प्रोक्तं भवेति यत् / एतस्यापो द्वितीया ते तनुर्नाम्ना भवत्विति
dvitīyaṃ nāmadheyaṃ te mayā proktaṃ bhaveti yat / etasyāpo dvitīyā te tanurnāmnā bhavatviti
I have declared your second name to be ‘Bhava’; and for this, let your second form be known by the name ‘Āpaḥ’—the Waters.