佛祖統紀 34.66

34.66

述曰。天台淨名疏言。佛生時星殞如雨。此因瑞應經有沸星下侍之言。故借佐傳之文。以形容耳。孤山淨覺不能別。乃稱天台正取二莊為佛生之年。然傳言辛卯。自是四月五日。可見不合。若欲實大傳夜明之事。正當以文殊放光涅槃為之驗也。

The commentary says: The Tiantai Commentary on the Vimalakīrtinirdeśa states that when the Buddha was born, stars fell like rain. Because the Ru ying jing mentions that 'a bubbling star descended to attend', it borrowed the text of the Zuo Tradition to describe it. Jingjue of Gushan could not discern this and claimed that Tiantai directly took the reigns of the two Zhuangs as the year of the Buddha's birth. However, the tradition states the day xinmao, which naturally was the fifth day of the fourth month, showing clearly that they do not match. If one wishes to substantiate the event of the night being bright in the Great Commentary, it is precisely verified by Mañjuśrī emitting light and entering nirvāṇa.