Agni Purāṇa

131 - Diagrams known as Ghatakachakra, Narachakra and Jayachakra indicating failure or success in battle etc. 

The lord said: 

1-3. The vowels commencing with 'a'should be written in a circular form commencing from the east. Oneshould write such circles for the months Chaitra (April-May) and the other months. The vowelsshould be considered as representing the lunar days first to thirteenth. If the (names of) lunar days of first, full moon, thirteenth, fourteenth, eighth, eleventh and seventh in the circle of Chaitra happened to be touched, oneshould know about one's victory or gains. Oneshould know that it augurs well if odd numbers (of vowels are present). It is said that it augurs bad if even numbers (of vowels are present). 

4-5. When the name of a person is pronounced at the time of commencement of the battle, if one's name begins with a long vowel, he will always have victory even in dreadful battles. If the name of the warrior (commences with)short vowel, he would die without any prevention. 

6. If the first letter is long and the middle letter is also long (both indicate) death. If two letters at the middle are first (among the letters), it would end in the death (of the person) without any doubt. 

7. If there are vowels at the beginning and the end, oneshould know (impending) death (if the vowels are)short and victory (if the vowels are) long. 

8. Ishall describe Narachakra (the figure of a man) consisting of asterisms. A human figure is drawn first and the asterisms are arranged (in order). 

9-11. Three asterisms are placed at the head (of the figure) one at its face, two at the eyes, four on the arms and two at the ears. Five asterisms (are placed) at the heart and six asterisms at the feet. The asterism for one's nameshould be found out and be placed at the centre of the drawing, at the eyes, head, right ear, right-hand, feet, heart, neck, left hand, secret organ and feet (of the human figure). 

12. Oneshould know that fatality is certain at that asterism occupied by the Sun, Saturn, Mars or Råhu (the ascending node). 

13. Ishall (now) describe the Jayachakra (the circle of victory). Oneshould draw letters a to ha. Oneshould draw thirteen lines (on a plane) and six lines obliquely. 

14-15. The quarters, planets, sages, Sun, priest and the lunar days are placed (in the chambers above) in order. Stupefaction, remembrance, scriptures, asterisms etc. and the letters a, ka, da, ma etc. (are written) below them. The Sun and other planets when placed in seven places, the planets are powerful at the end of the name. (The planets) Sun, Saturn and Mars (are) for victory and the planet Mercury for truce. 

16-18. Twelve lines are drawn, six on the right and six on the left. Fourteen, twentyseven, two, one, fifteen, six, four, three and seventeen are known as weak points for wealth. The letters a, ka, ta and pashould be located below. After having assigned letters one by one the restshould be located as follows: the figure made up of letters comprising the nameshould be divided by eight. 

19-20. The quotient if identical with the number represented by a crow (fourteen) would signify the diagram a strong one, while the same equal to the numbers represented by an ass, bull, elephant, lion, horse and camel would signify greater success respectively than the preceding one.