Rudra-prasava-varṇana
The Manifestation and Naming of Rudra / Nīlalohita
दिशः पत्न्यः स्मृतास्तस्य स्वर्गश्चापि सुतः स्मृतः / अग्रा तनुः सप्तमी या दीक्षितो ब्राह्मणः स्मृतः
diśaḥ patnyaḥ smṛtāstasya svargaścāpi sutaḥ smṛtaḥ / agrā tanuḥ saptamī yā dīkṣito brāhmaṇaḥ smṛtaḥ
His wives are remembered as the Directions, and his son is also known as Svarga, Heaven. The seventh form, called Agrā, is said to be a brāhmaṇa consecrated by dīkṣā.