《资治通鉴·唐纪·唐纪六十二》
当年八月，紫宸殿前院的樱桃树上发现有甘露降临，文宗亲自采集品尝，百官齐声称贺，认为是祥瑞。
是岁，八月，有甘露降于紫宸殿前樱桃之上，上亲采而尝之，百官称贺。
In August of the same year, nectar was found on the cherry tree in the courtyard of Zichen Hall. Wenzong personally collected and tasted it, and all the officials cheered and congratulated him, thinking it was a good sign.