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[Nishīthasūtra
16. A monk who recites or approves the recitation of later recitation-worthy sūtras without first reciting the earlier recitation-worthy sūtras.
17. A monk who recites or approves the recitation of Uttamaśruta without first reciting the first Śruta-skandha called Nava-brahmacarya-adhyayana. (He incurs the Laghu-cāumāsī prāyaścitta.)
Discussion - Just as a group of people sitting together and listening to someone's discourse is called "samavasarana", similarly, the Āgama which contains the collection of discussions of many principles is also called "samavasarana".
Just as the first (or lower) floor of a house is called "heṭṭhill" (adhastana) and the second floor is called "uvarill", similarly, here in the sūtra, the Āgama of the first recitation is called "heṭṭhill" and the Āgama of the subsequent recitation is called "uvarill".
Therefore, the Āgama, Śruta-skandha, adhyayana, uddeśaka, etc., which are to be recited first in sequence, are recited first, and those which are to be recited later are recited later. For example:
1. The recitation of Ācārāṅgasūtra is done first and the recitation of Sūyagaḍaṅgasūtra is done later.
2. The recitation of the first Śruta-skandha is done first and the recitation of the second Śruta-skandha is done later.
3. The recitation of the first adhyayana and in it also the first uddeśaka is done first and the recitation of the subsequent adhyayana uddeśakas is done later.
The Cūrṇikāra has stated here that the Āvaśyaka-sūtra is the first recitation-sūtra in comparison to the Daśavaikalika. The Daśavaikalika-sūtra is the first recitation-sūtra in comparison to the Uttarādhyayana-sūtra. Even in the Āvaśyaka-sūtra, the Samāyika adhyayana is the first recitation-worthy, the remaining adhyayana are recitation-worthy in sequence thereafter.
Vyav. U. 10 gives the order of recitation of the Kālika sūtras and also explains the relationship of the dīkṣā paryaya. In that order, the Utkalikaśruta and Jñātādharmkathā etc. angas are not mentioned. Only the order of Ācāraśāstra and Saṅgraha śāstras is given. Therefore, it should be understood that there is no definite order of the Jñātādi Kālika-sūtra and Uvvai etc. Utkalika sūtras which describe the story or the life of a tapasvi samyami. And many sūtras have been composed and compiled after the composition of the Vyavahāra-sūtra. Therefore, their study order is not there. Therefore, the Gītartha Muni can recite them whenever he finds an opportunity. The prāyaścitta mentioned in the present sūtra should be understood as an inversion of the order mentioned in the Vyavahāra-sūtra.
The above order of Āvaśyaka-sūtra and Uttarādhyayana-sūtra mentioned by the Cūrṇikāra should be understood as the order before Ācārāṅga.
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