lay down the law
Assert something positively and often arrogantly, state something dogmatically. For example, Dad laid down the law about locking up the house. This colloquial expression, first recorded in 1762, uses lay down in the sense of def. 2.
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How to use lay down the law in a sentence
France 24 is providing live, round-the-clock coverage of both scenes as they progress.
Unless there is a court decision that changes our law, we are OK.
Submission is set in a France seven years from now that is dominated by a Muslim president intent on imposing Islamic law.Houellebecq’s Incendiary Novel Imagines France With a Muslim President|Pierre Assouline|January 9, 2015|DAILY BEAST
A few days later, Bush replied, “We will uphold the law in Florida.”
To those who agreed with him, Bush pledged that the law against same-sex marriage would remain intact.
The bride elect rushes up to him, and so they both step down to the foot-lights.Physiology of The Opera|John H. Swaby (AKA "Scrici")
I take the Extream Bells, and set down the six Changes on them thus.Tintinnalogia, or, the Art of Ringing|Richard Duckworth and Fabian Stedman
His wife stood smiling and waving, the boys shouting, as he disappeared in the old rockaway down the sandy road.The Awakening and Selected Short Stories|Kate Chopin
We should have to admit that the new law does little or nothing to relieve such a situation.Readings in Money and Banking|Chester Arthur Phillips
So he bore down on the solemn declaration that she stood face to face with a prison term for perjury.The Bondboy|George W. (George Washington) Ogden