Rudra-prasava-varṇana
The Manifestation and Naming of Rudra / Nīlalohita
चतुर्थस्य चतुर्थी तु वायुर्नाम्ना तनुस्तव / इत्युक्ते यच्छरीरस्थं पञ्चधा प्राणसंज्ञितम्
caturthasya caturthī tu vāyurnāmnā tanustava / ityukte yaccharīrasthaṃ pañcadhā prāṇasaṃjñitam
The fourth aspect of the fourth was named “Vāyu” for you; when this was spoken, the prāṇa abiding within his body became divided fivefold.