Shiva Purana
मम पञ्चमुखान्याहुः स्थाने तेषां वरानने ॥ पूर्वादेश्चोर्ध्वपर्यंतं नकारादि यथाक्रमम् ॥ ४९ ॥
As their places, my faces beginning with the one in the east and ending with the one above are taken. They are identified with the letters “Na” etc. in order.
english translation
mama paJcamukhAnyAhuH sthAne teSAM varAnane ॥ pUrvAdezcordhvaparyaMtaM nakArAdi yathAkramam ॥ 49 ॥
hk transliteration by Sanscript