Great Tantric Compendium 2.913

Bṛhattantrasāra 2.913

ādhārādipādaparyantaṃ hrāṃ namaḥ |
kaṇṭhādādhāraparyantaṃ hrīṃ namaḥ |
mūrddhādikaṇṭhaparyantaṃ saḥ namaḥ |