Narapatijayacarya 3.1.17

On "beginning with the twelve-year cycle": the eight sounds ending with the twelve-year cycle down to the nāḍī rise from their own place, from their own time, by their own measure of transit, consisting of twelve years and so forth. There, by their own measure of transit, it is construed that they rise again within by eleven risings. Therefore, when one desires to know the interval rising, whichever division occurs there by eleven, that exists there in the measure of the interval rising—thus it was indicated earlier, and done in the very same way. "Year..." is clear. On "twelve-year...": whatever has elapsed of the twelve-year sound and the others would result when subtracted from the quotient of the divisor in the yāmala. There, having divided the elapsed and to-be-elapsed palas by sixty and so on, the elapsed measure is to be made from the elapsed, and the to-be-elapsed measure from the to-be-elapsed. The quotient should be known as the elapsed sounds; in the remainder are the present sounds. In this case, having converted the present into palas, and having taken the quotient by sixty as elapsed and to-be-elapsed, it is divided by the measure of the interval rising obtained by eleven.

Now he states the strength of the five states beginning with child:

For a sound that has risen, according to the sound of the name,
there are those five states beginning with child, according to the measure of each one's time:

The first is child, then youth, young adult, old, and dead;
they bestow fruits in accordance with the nature of their own state—no doubt on this point.

The child brings slight gain, but the youth grants half gain;
the young adult brings all accomplishment; in the old is loss; in the dead, destruction.

In a military march, battle, and dispute, in [finding] what is lost or seen, and for one afflicted with disease,
the child-sound is harmful; in auspicious events such as marriage, it is auspicious.

In all auspicious undertakings, especially at the time of a military march,
the youth brings accomplishment; in battle, victory over the enemy.

In auspicious and inauspicious undertakings, in the ritual accomplishment of diagrammatic devices, mantras, and the like,
the young adult brings all accomplishment, especially in a military march and in battle.

In giving gifts, worshiping deities, initiation, and the application of secret mantras,
the old-sound is suitable; in battle it causes defeat, in traveling it causes fear.

Auspicious [acts] such as marriage, and all inauspicious [enterprises] such as battle—
men should undertake none of these when the dead-sound has risen.

The dead, the child, the old, the youth, and the young adult:
all these are to be known by knowers of sounds as possessing progressively greater strength.