《太平广记·卷二百一十二·画三》
唐玄宗开元年间，关中一带大旱，京都长安雨水缺得尤其厉害。
唐开元，关辅大旱。京师缺雨尤甚。
During the reign of Emperor Xuanzong of the Tang Dynasty, there was a severe drought in the Guanzhong area, and the rainfall in the capital Chang'an was particularly severe.