《资治通鉴·唐纪·唐纪三十一》
等离温汤十余里时，敬忠苦苦哀求，吉温才让他在一棵桑树下写下了三张纸的证词，内容完全如吉温要求的一样。
去温汤十馀里，敬忠恳请哀切，乃于桑下令答三纸，辩皆如温意。
When they were over ten miles away from Wenquan, after Jingzhong begged hard, Ji Wen finally allowed him to write three pieces of testimony under a mulberry tree, which were exactly as Ji Wen required.