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It is prescribed to consume three *dattis* each of food and water on the thirteenth day of the *vyavaharsutra*. On the fourteenth day, it is prescribed to consume two *dattis* each of food and water. On the *amavasya* (new moon) day, it is prescribed to consume one *datti* each of food and water. On the first day of the bright fortnight, it is prescribed to consume two *dattis* each of food and water. On the second day, it is prescribed to consume three *dattis* each of food and water. On the third day, it is prescribed to consume four *dattis* each of food and water. On the fourth day, it is prescribed to consume five *dattis* each of food and water. On the fifth day, it is prescribed to consume six *dattis* each of food and water. On the sixth day, it is prescribed to consume seven *dattis* each of food and water. On the seventh day, it is prescribed to consume eight *dattis* each of food and water. On the eighth day, it is prescribed to consume nine *dattis* each of food and water. On the ninth day, it is prescribed to consume ten *dattis* each of food and water. On the tenth day, it is prescribed to consume eleven *dattis* each of food and water. On the eleventh day, it is prescribed to consume twelve *dattis* each of food and water. On the twelfth day, it is prescribed to consume thirteen *dattis* each of food and water. On the thirteenth day, it is prescribed to consume fourteen *dattis* each of food and water. On the fourteenth day, it is prescribed to consume fifteen *dattis* each of food and water. On the *purnima* (full moon) day, he observes a fast. Thus, this is followed according to the *vajramadhyachandrapratima sutra* and as per the knowledge of the Jinas.
**Discussion:** Just as the phases of the moon increase in the bright fortnight and decrease in the dark fortnight, similarly, the number of *dattis* of food in these two *pratiamas* is decreased and increased in accordance with the order of the lunar days. Therefore, these two *pratiamas* are called "Chandrapratima". Just as a grain of barley (cereal) is thin at one end, then thick in the middle, and thin at the end, similarly, the *pratima* in which one *datti* is consumed at the beginning, fifteen *dattis* in the middle, one *datti* at the end, and then a fast is observed, is called "Yavamadhyachandrapratima". Just as a vajra gem or a *damaru* (drum) has a wide end, a narrow middle part, and a wide other end, similarly, the *pratima* in which fifteen *dattis* are consumed at the beginning, one *datti* in the middle, fifteen *dattis* at the end, and then a fast is observed, is called "Vajramadhyachandrapratima". These two *pratiamas* can only be observed by a monk who is particularly strong and has a good past. In these *pratiamas*, the *dattis* of food and water are consumed in accordance with the *sutra*, gradually decreasing and increasing. Along with the number of *dattis* of food and water, the monk observing these *pratiamas* must also follow the following rules: