Text 7]
The Nārāyaṇa-kavaca Shield
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put on oneself;  bhaye —when fear;  āgate —has come;  pādayoḥ —on the two legs;  jānunoḥ —on the two knees;  ūrvoḥ —on the two thighs;  udare —on the abdomen;  hṛdi —on the heart;  atha —thus;  urasi —on the chest;  mukhe —on the mouth;  śirasi —on the head;  ānupūrvyāt —one after another;  omkāra-ādini —beginning with  omkāra ;  vinyaset —one should place;  om —the  praṇava ;  namaḥ —obeisances;  nārāyaṇāya —unto Nārāyaṇa, the Supreme Personality of Godhead;  iti —thus;  viparyayam —the reverse;  atha api —moreover;  vā —or.
TRANSLATION
Viśvarūpa said: If some form of fear arrives, one should first wash his hands and legs clean and then perform ācamana by chanting this mantra:  om apavitraḥ pavitro vā sarvāvasthāṁ gato 'pi vā/ yaḥ smaret puṇḍarikākṣaṁ sa bahyābhyantaraḥ śuciḥ/ śri-viṣṇu śri-viṣṇu śri-viṣṇu . Then one should touch kuśa grass and sit gravely and silently, facing north. When completely purified, one should touch the mantra composed of eight syllables to the eight parts of his body and touch the mantra composed of twelve syllables to his hands. Thus, in the following manner, he should bind himself with the Nārāyaṇa coat of armor. First, while chanting the mantra composed of eight syllables [ om namo nārāyaṇāya ], beginning with the  praṇava , the syllable  om , one should touch his hands to eight parts of his body, starting with the two feet and progressing systematically to the knees, thighs, abdomen, heart, chest, mouth and head. Then one should chant the mantra in reverse, beginning from the last syllable [ ya ], while touching the parts of his body in the reverse order. These two processes are known as  utpatti-nyāsa  and  saṁhāra-nyāsa  respectively.
TEXT 7
करन्यासं ततः कुर्याद् द्वादशाक्षरविधया ।
प्रणवादियकारान्तमङ्गुल्यङ्गुष्ठपर्वसु
॥ ७ ॥
kara-nyāsaṁ tataḥ kuryād dvādośākṣara-vidyayā praṇavādi-ya-kārāntam aṅguly-aṅguṣṭha-parvasu