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Based on the sutras, the Vinaya and later commentaries
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The Buddha explains the eight causes of earthquakes and reproaches Ānanda

Attested across multiple schools

asks why the earth quaked, and the Buddha gives eight causes, the seventh of which is a Buddha's relinquishing of the life force. The Pali canon of the Southern tradition and the Mahāparinirvāṇa Sūtra translated by Faxian go on to the eight assemblies, the eight bases of mastery and the eight liberations, meditative subjects, and recount 's request that he pass away. Only then does Ānanda ask three times that the Buddha remain in the world; the Buddha says it is too late, lists the occasions in , and elsewhere when he had hinted and Ānanda had not asked, and reproaches him.

Different Accounts

The content of the eight causes: the last four in the Chinese Ekottarika Āgama differ from the other accounts, for example “the merit of beings is exhausted, kings attack one another”.

More differences between accounts (3)

Order: the Chinese Youxing jing places Ānanda's request that the Buddha remain after the Buddha assembles the community at the Fragrance shrine; in the Pali canon of the Southern tradition everything happens at the Cāpāla shrine.

The Mahāparinirvāṇa Sūtra translated by Faxian says Ānanda's “heart was so stricken with grief that blood showed through his whole body”, that is, he grieved until his whole body seemed to seep blood.

The Sanskrit Mahāparinirvāṇa Sūtra has no eight assemblies, eight bases of mastery or eight liberations here; the passage on the eight assemblies comes later, after the second earthquake at (see the entry “The earth quakes again”).

Dating

Year 45 after the Awakening, the Buddha aged seventy-nine to eighty, after the , on the same day as the relinquishing of the life force; the later commentaries say the full moon of Māgha, so on the commentaries' account it can be fixed to the day.

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Research Notes: Reliability, Dating and Sources
How Reliability Is Assessed

The episode of “the causes of the earthquake” is recorded by five schools: the Pali canon of the Southern tradition, the Chinese Dīrgha Āgama, the Sanskrit Mahāparinirvāṇa Sūtra, the Chinese Fo bannihuan jing and Bannihuan jing and the Chinese three-fascicle Mahāparinirvāṇa Sūtra. Attested across multiple schools. The “eight assemblies” within it are recorded by three schools; “Ānanda's request to remain and the reproach” by five schools.

Dating Evidence and Precision

Stated in the canonical text (the text itself gives the time); commentarial dating (the canonical texts give no date; later commentaries record it). Time precision: fixed to the day, month only.

Sources

Back to Year 45 after the Awakening · The Buddha at 79 to 80

Source text

日期怎麼讀

成道第幾年
從佛陀成道開始,每經過一次雨季安居算一年,每一年算到安居結束為止;所有年歲一律依二十九歲出家、三十五歲成道推算。
年份依據
區分經文自己明記、後世註解書記載、先後順序推定及年歲換算。
時間精確度
分別說明確定到日、月、年,或只能放入某幾年之間。
可信度
多派共傳、兩派記載、單派記載與後世補述,表達記載的共傳範圍;與時間及位置是否確定分開閱讀。