《太平广记·卷八十九·异僧三》
姚兴弘始三年三月，皇宫院内的逍遥园长了一棵连理树，葱变为菃，人们都说这是吉祥之兆，要有才智之人应召入关。
兴弘始三年三月，有树连理，生于庙庭逍遥园，葱变为菃，以为美瑞，谓智人应入。
In the third month of the third year of Yao Xing's reign, a "joined-root tree" sprouted in the逍遥园 in the Imperial Palace, where green leeks transformed into Chinese chives. People all said that this was an auspicious sign that a talented individual with great wisdom would be called to enter the pass.