【发 音】qǐng jūn rù wèng
【解 释】或：有人。
通：串通。
谋：谋反。
鞫：审问。
方：正在。
推：推究。
索：索取。
文昌右丞：官职名，主管司法。
周兴与丘神绩：二人是武则天时期的官员。
通谋：联络谋反
太后：武则天
来俊臣：武则天时期的官员
鞠：通“鞫”，审讯
推事：议论公务
承：供认
翁：坛子
炙：烤
内状；皇帝的诉状
推：起诉
伏：承认
【启 示】“请君入瓮”后用作成语，比喻以其人之道，还治其人之身。也是比喻某人用来整治别人的办法，来整治他自己。它揭露了酷吏的残忍，也教会人们一种以牙还牙的斗法；同时告诫人们不要作法自毙。
【出 处】①唐·张鷟《朝野佥载·周兴》：“即索大瓮，以火围之，起谓兴曰：‘有内状勘老兄，请兄入此瓮。’”
②《资治通鉴·唐纪·则天皇后天授二年》：“兴曰：‘此甚易尔！取大瓮，令囚入中，何事不承！’俊臣乃索大瓮，火围如兴法，因起谓兴曰：‘有内状推兄，请兄入此瓮。’兴惶恐叩头伏罪。”
【典 故】唐朝的武则天,是中国历史上惟一的一位女皇帝。她为了维持自己的统治，采用严刑峻法，消除异己。因此，她手下的一些酷吏，便借机想方设法诬陷自己的政敌，并绞尽脑汁制造酷刑逼供。朝廷上下，笼罩着高压的恐怖气氛。
武则天的两名大臣周兴和来俊臣，是当时有名的酷吏，成千上万的人冤死在他们手下。有一次，周兴被人密告伙同丘神绩谋反。武则天便派来俊臣去审理这宗案件，并且定下期限审出结果。来俊臣和周兴平时关系不错，感到很棘手。他苦思冥想，生出一计。
一天，来俊臣故意请来周兴，两人饮酒聊天。来俊臣装出满脸愁容，对周兴说：“唉！最近审问犯人老是没有结果，请教老兄，不知可有什么新绝招？”周兴一向对刑具很有研究，便很得意地说：“我最近才发明一种新方法，不怕犯人不招。用一个大瓮，四周堆满烧红的炭火，再把犯人放进去。再顽固不化的人，也受不了这个滋味。”
来俊臣听了，便吩咐手下人抬来一个大瓮，照着刚才周兴所说的方法，用炭火把大瓮烧得通红。来俊臣突然站起来，把脸一沉，对周兴说：“有人告你谋反，太后命我来审问你，如果你不老老实实供认的话，那我只好请你进这个大瓮了！”
周兴听了惊恐失色，知道自己在劫难逃，只好俯首认罪。
【用 法】
兼语式；作谓语、定语；用于书面语。
【示 例】①鲁迅《坟·论费厄泼赖》：“我可以立刻回答：当然是要的，然而尚早。这就是‘～’法。”
② 清·蒲松龄《聊斋志异·席方平》：“掬西江之水，为尔洗肠，即烧东壁之床，～。 ”
【近义词】以毒攻毒、以牙还牙、以其人之道，还治其人之身。
【歇后语】来俊臣的高招 ——请君入瓮
【原 文】或告文昌右丞周兴与丘神绩通谋，太后命来俊臣鞠之。
俊臣与兴方推事对食，谓兴曰：“囚多不承，当为何法？”兴曰：“此甚易耳！取大瓮，与炭四周炙之，令囚入中，何事不承？”俊臣乃索大瓮，火围如兴法，因起谓兴曰：“有内状推兄，请兄入此瓮。”兴惶恐叩头伏罪。
【译 文】有人控告文昌右丞周兴和丘神绩串通谋反，武则天命令来俊臣审查此案。来俊臣正在 和周兴办理案子一起吃饭，他问周兴说：“囚犯多不肯招认，应该采取什么办法 ? ”周兴说 ：“这太容易了 ! 抬个大瓮来，用炭火在四面烤，再叫犯人进到里面，还有什么能不招认 ! ”来俊臣派人找来一口大瓮，按照周兴出的主意用火围着烤，然后站起来对他说：“有人告你谋反，太后让我审查你,请老兄自己进到瓮里吧! ”周兴十分惊恐，立即叩头认罪。
【英文版】
Kindly Step into the Vat--Try What You Have Devised against Others In order to suppress those who were against her, Wu Zetian, the empress of the Tang Dynasty (618-907), appointed a few merciless persons to be judges. Two of them were extremely brutal; one was called Zhou Xing and the other was called Lai Junchen. They killed many upright civil and military officials as well as ordinary people by framing up cases against them and by administering inhuman corporal punishment to them. Once, Wu Zetian received a letter which informed against Zhou Xing. The letter aside that Zhou Xing was plotting a rebellion in collaboration with others. Wu Zetian was furiously angry when she read the letter, and immediately ordered Lai Junchen to deal with the case severely. Hearing the order, Lai Junchen had misgivings about it. He knew that Zhou Xing could not be forced to tell the truth merely by using a letter informing against him because he was very sly and crafty. Lai Junchen also knew that he would not be for given if he should fail in dealing with the case, because the empress would certainly blame him and punish him. How could he solve the problem then? He turned the problem over and over in his mind, and finally thought out a "brilliant scheme". Lai Junchen had a sumptuous feast prepared, and invited Zhou Xing to his home. The two of them urged each other to drink, and they talked while drinking. After the wine had gone round three times, Lai Junchen pretended to sigh, "When Ihandle cases in ordinary times, I often com across prisoners who stubbournly refuse to admit they are guilty. I wonder if you have any effetive measures." Hearing this, he took a sip of the wine. Lai Junchen immediately pretended to be very earnest, saying, "Oh, please do tell me at once." Smiling insidiously, Zhou Xing said, "Get a big vat, scorch it hot with charcoal fire all around, and then let the prisoner come into the vat. Will the prisoner fail to make a confession of his crime?" Hearing this. LaiJunchen nodded his head in approval repeatedly. He then ordered his subordinates to bring a big vat, and had a charcoal fire lit all around it as Zhou Xing had said. He then turned to Zhou Xing and said, "Someone in the imperial court has informed against you, saying that you are plotting a rebellion. The empress has ordered me to deal with the case severely. So I beg your pardon, but would you kindly step into the "Someone in the imperial court has informed against you, saying that you are plotting a rebellion. The empress has ordered me to deal with the case severely. So I beg your pardon, but would you kindly step into the vat?" Hearing this, Zhou Xing dropped his wine cup to the ground and the cup broke with a crash. Then he knelt down with a flop, nodded repeatedly and said, "I am guilty. I confess I am guilty." This story appears in A General History as a Mirror of Past Events by Sima Guang of the Song Dynasty. From this story, people have derived the set phrase "kindly step into the vat -- try what you have devised against others".