everyone says so; in one voice ❍ 杀伤疾患，十室九空。百姓怨嗟，～。(韩愈《黄家贼事宜状》) Even the sick people were killed and the slaughter stripped nine houses out of ten bare. The common people sighed and complained in one voice.
如出一口rú chū yī kǒu
就像从一张嘴里说出来的一样。形容众口同声，说法一样。everyone says so, in one voice, All say the same thing.