Garudapurana 1.39.8

1.39.8

vāratrayaṃ padmamudrāṃ bimbamudrāṃ ca darśayet /
oṃ āṃ hṛdayāya namaḥ /
oṃ arkāya śirase svāhā /
oṃ aḥ bhūrbhuvaḥ svaḥ jvālini śikhāyai vaṣaṭ /
oṃ huṃ kavacāya huṃ /
oṃ bhāṃ netrābhyāṃ vauṣaṭ /
oṃ vaḥ astrāya phaḍiti //

Three times one should show the lotus-mudrā and the orb-mudrā:
"Om āṃ, homage to the heart.
Om, svāhā to the head, to the Sun.
Om aḥ bhūḥ bhuvaḥ svaḥ jvālini, vaṣaṭ to the tuft of hair.
Om huṃ, huṃ to the armor.
Om bhāṃ, vauṣaṭ to the two eyes.
Om vaḥ, phaṭ to the weapon."