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The *Kalikashrut* is studied in all four *kalas*, while the *Utkalikashrut* is studied or its meaning is grasped in the other *praharas*. In the third *prahara* of the day, one should not engage in the study of the *Utkalikashrut* or other activities. In the second *prahara* of the night, one should either study the *Utkalikashrut* or sleep. In the third *prahara* of the night, one should sleep and then wake up and engage in the study of the *Utkalikashrut* if time permits. Then, in the fourth *prahara*, one should study the *Kalikashrut*.
This is a description of the daily routine of a *sadhu*, which is filled with study. In the *paurushi* of the *utkala*, one can engage in the study of the *sutras*, the meaning of the *sutras*, food, sleep, and other activities. However, in all four *kalas* and *paurushi*, only study is performed. According to *Uttara. A. 26*, if a *guru* or someone else asks for service during the time of study, one should perform it. If not, one should remain absorbed in study.
This study is of the *Kalikashrut*. It includes memorizing new material or repeating what has already been memorized. Once the new material has been memorized, one only needs to repeat it.
*Vyav. U. 4* states that it is essential for *sadhus* and *sadhvis* to retain the knowledge they have learned. If they forget, they are subject to the most severe *prayaschitta*. This means that if they forget due to negligence, they will not be given any position for the rest of their lives. If they are already holding a position, they will be removed from it. Only elderly *sthaviras* are exempt from this *prayaschitta*.
Therefore, memorizing the *shrut* and keeping it stable can only be achieved through continuous study.
*Uttara. A. 26* describes study as the *uttaraguna* of *samyama*. It is said to liberate one from all suffering and purify all *bhavas*.
By holding these teachings in their hearts, *bhikshus* should always be engaged in study and avoid the *prayaschitta* mentioned in the *sutras*. This means they should not waste time on idle talk, negligence, or other activities besides study.
**Prayaschitta for Studying During the Time of Non-Study**
14. A *bhikshu* who studies during the time of non-study or approves of someone who does so, receives the *laghuchoumasi prayaschitta*.