大唐西域記 2.4.4

2.4.4

Translators of the Sûtras (king) and the Vinaya (liu) belonging to former generations employed the terms Tso-hia and Tso-la-hia to signify the rest during the rainy season; but this was because the ignorant (common) people of the frontier countries did not understand the right sounds of the language of the middle country (India), or that they translated before they comprehended the local phrases: this was the cause of error. And for the same reason occur the mistakes about the time of Tathâgata's conception, birth, departure from his home, enlightenment, and Nirvâṇa, which we shall notice in the subsequent records.