कामिक आगम: पूर्व भाग (अष्टाविंशति मूल शैव आगमों का प्रथम एवं सर्वोच्च आगम महाकोश)

The five letters which denote the 5 tattvas are to be inscribed in the south-east
quadrant, proceeding from the south-east towards west; then form the south-west
towards north and from the north-west towards east. All the letters, which are
20 in number, are to be inscribed in the square grids in due order as told now.
अपहकट इत्येवं अवटपर एव च ।
नयमजख वर्णश्च गजदचल एव च ।। ४
a pa ha ka t'a ityevam a va t'a pa ra eva ca
nay a ma ja kha varn.as'ca ga ja da ca la eva ca 4
The 20 letters arranged in four groups are: (1) a, pa, ha ,ka, t'a ;(2) a, va, t'a, pa,ra;
(3) na, ya, ma, ja, kha; (4) ga, ja, da, ca, la.
ईशान मण्डले कुर्यात् पञ्चविंशति कोष्टके ।
पश्चिमाभिमुखं पूर्वं लिखितानां तृतीयकम् ।। ५
पञ्चमं नामनक्षत्रं स्वेनयुक्तान् स्वरान् न्यसेत् ।
एकादश न्यसेत्पश्चात् प्रान्ते न्यसेत् त्रयोदश ।। ६
i's'a'na man.d'ale kurya't pan''ca vims'ati kos''t'ke
pas'cima'bhimukham pu'rvam likhita'na'm triti'yakam 5
pan''camam na'ma naks''atram svenayukta'n svara'n nyaset
eka'das'a nyaset pas'cat pra'nte nyaset trayodas'a 6
The Guru should write these 20 letters in due order in the north-east quadrant
which consists of 25 grids, starting from the north-east corner and proceeding
towards south. After completing the fourth row, the Guru should write in the
fifth row, the third and the fifth letters of the fourth row lying in the west. And
then he should write the 11ᵗʰ vowel and the 13ᵗʰ vowel.(in this process, now the
25ᵗʰ grid remains to be inscribed, as explained in the 7ᵗʰ verse)