Garudapurana 1.26.1

1.26.1

śrīgarūḍamahāpurāṇam- 26
sūta uvāca /
anantaraṃ karanyāsaḥ /
vidyākarī śuddhiḥ kāryā /
padmamudrāṃ baddhvā mantranyāsaṃ kuryāt /
kaiṃ kaniṣṭhāyai namaḥ /
naiṃ anāmikāyai namaḥ /
maiṃ madhyamāyai namaḥ /
taiṃ tarjanyai namaḥ /
aṃ aṅguṣṭhāyai namaḥ /
lāṃ karatalāyai namaḥ /
vāṃ karapṛṣṭhāyai namaḥ //

The glorious Garuḍa Purāṇa — 26. / Sūta said: / Next is the nyāsa on the hands. / The purification that imparts knowledge should be performed. / Having formed the lotus gesture, one should perform the placement of mantras: / Kaiṃ, obeisance to the little finger; / Naiṃ, obeisance to the ring finger; / Maiṃ, obeisance to the middle finger; / Taiṃ, obeisance to the index finger; / Aṃ, obeisance to the thumb; / Lāṃ, obeisance to the palm; / Vāṃ, obeisance to the back of the hand.