大唐西域記 8.67

8.67

菩提樹南十餘里，聖迹相隣，難以備舉。每歲比丘解安居，四方法俗百千萬眾，七日七夜，持香花，鼓音樂，遍遊林中，禮拜供養。印度僧徒依佛聖教，皆以室羅伐拏月前半一日入兩安居，當此五月十六日；以頞濕縛庾闍月後半十五日解兩安居，當此八月十五日。印度月名，依星而建，古今不易，諸部無差。良以方言未融，傳譯有謬，分時計月，致斯乖異，故以四月十六日入安居，七月十五日解安居也。

For this cause this convent entertains many priests of Ceylon. To the south of the Bôdhi tree 10 li or so, the sacred traces are so numerous that they cannot be each named. Every year when the Bhikshus break up their yearly rest of the rains, religious persons come here from every quarter in thousands and myriads, and during seven days and nights they scatter flowers, burn incense, and sound music as they wander through the district and pay their worship and present their offerings. The priests of India, according to the holy instruction of Buddha, on the first day of the first half of the month Sravana enters on Wass. With us this is the sixteenth day of the fifth month; they give up their retreat on the fifteenth day of the second half of the month Asvayuja, which is with us the fifteenth day of the eighth month. In India the names of the months depend on the stars, and from ancient days till now there has been no change in this. But as the different schools have translated the accounts according to the dialects of the countries without distinguishing one from the other, mistakes have arisen, and as a consequence contradictions are apparent in the division of the seasons. Hence it is in some places they enter on Wass on the sixteenth day of the fourth month, and break up on the fifteenth day of the seventh month.