佛祖統紀 52.61

52.61

唐大宗。原州奏。鴻池谷有五石。青質白文曰。太平天子李世民太子李治七佛八菩薩。勅遣使祭謝○帝得祕讖云。唐三世後。女主武王代有天下。太史令李淳風曰。其兆已成今在宮中。上曰疑似者殺之。對曰。天命不可易。遂止○肅宗詔沙門元皎建藥師道場。忽生李樹四十九莖○尼真如升天見天帝。授天寶十三枚。以鎮下方。乃改元寶應（自肅宗至昭宗為十三代）○睿宗為相王。每出萬回告人曰。天子來矣。玄宗在藩謁之。撫其背曰。五十年太平天子。

Under Emperor Taizong of the Tang, Yuanzhou reported that in the Hongchigu Valley there were five stones, of blue quality with white markings, that read: 'Li Shimin, the Son of Heaven of Great Peace; Li Zhi, the Crown Prince; seven Buddhas and eight bodhisattvas.' An imperial decree sent an envoy to offer sacrifices of gratitude. The Emperor obtained a secret prophecy stating: 'After three generations of the Tang, a female ruler, King Wu, will replace it and possess all under heaven.' The Grand Astrologer Li Chunfeng said: 'The omen is already complete; she is now in the palace.' The Emperor said: 'Let us kill anyone suspected.' He replied: 'Heaven's decree cannot be altered.' The Emperor therefore desisted. Emperor Suzong ordered the śramaṇa Yuanjiao to construct a Bhaiṣajyaguru ritual arena; suddenly forty-nine plum tree stems grew. The nun Zhenru ascended to heaven and saw the Lord of Heaven, who bestowed thirteen heavenly treasures to pacify the earthly realm below; thereupon the reign title was changed to Baoying ('Treasured Response'—from Suzong to Zhaozong was thirteen generations). When Emperor Ruizong was the Prince of Xiang, whenever he went out Wanrui told people: 'The Son of Heaven is coming!' When Xuanzong was still in his princely estate he visited him, and Wanhui patted his back, saying: 'Son of Heaven of fifty years of great peace!'