Shiva Purana
अं जिह्वायामथो तालुन्यः प्रयोज्यो यथाक्रमम् ॥ कवर्गं दक्षिणे हस्ते न्यसेत्पञ्चसु संधिषु ॥ २६ ॥
Aṁ should be applied to the tongue and then to the palate in this order. Place the kavarga in the right hand at the five joints.
english translation
aM jihvAyAmatho tAlunyaH prayojyo yathAkramam ॥ kavargaM dakSiNe haste nyasetpaJcasu saMdhiSu ॥ 26 ॥
hk transliteration by Sanscript