《资治通鉴·唐纪·唐纪二十一》
乐思晦的儿子未满十岁，被籍没入司农寺为奴，要求上告特别情况，获得太后召见。
乐思晦男未十岁，没入司农，上变，得召见。
Le Sihui's son was not yet ten years old and was confiscated into the Sinong Temple as a slave. He asked to report the case, and was summoned by the Empress Dowager.