《资治通鉴·后唐纪·后唐纪二》
到现在，吴王对徐温说 雨 字时总要改为 水 字，徐温请吴王解释一下这个缘故。
至是，王对温名雨为水，温请其故。
At this point, whenever the King of Wu would say the character 雨, he would have to change it to 水. Xu Wen asked the King of Wu to explain the reason for this.