Bhagavatapurana 3.12.46

3.12.46

majjāyāḥ paṅktir utpannā bṛhatī prāṇato 'bhavat /
sparśas tasyābhavaj jīvaḥ svaro deha udāhṛta //

45 & 46. The Ushnik metre issued from His hair, Gayatri from his skin, Trishtup from His flesh, Anushtup from His tendons, Jagati from the bones of Prajapathi, Pankti from his marrow, Brihati from His prana (the vital breath); the five clases of consonants were formed out of his Jiva (Life) and swaras (vowels) formed His body.