lay at rest

lay (something) at rest

To resolve, satisfy, or conclude something; to pacify or calm something. We've been arguing over this will for nearly a year now. Can't we just lay this all at rest? I hope this explanation will help finally lay these questions at rest. News of the bailout has laid the turbulent markets at rest, at least for the time being.
See also: lay, rest
Farlex Dictionary of Idioms.

lay at rest

Also, lay to rest; set at rest. Satisfy, settle, as in I'll take care of it; you can set your mind at rest, or The arbitrator is sure to lay these questions to rest. [Late 1300s] Also see at rest; lay to rest.
See also: lay, rest
The American Heritage® Dictionary of Idioms by Christine Ammer.
See also:
  • a crack at (someone or something)
  • a slew of (something)
  • a slue of (something)
  • a whack at (something)
  • a/the feel of (something)
  • (I) wouldn't (do something) if I were you
  • a straw will show which way the wind blows
  • all right
  • (you) wanna make something of it?
  • all for the best
References in classic literature
I did not despair of still finding that evidence, and I had lost none of my anxiety to discover it, for I had lost none of my interest in tracing the father of the poor creature who now lay at rest in Mrs.
The Woman in White
Hard by, was a little churchyard; not crowded with tall unsightly gravestones, but full of humble mounds, covered with fresh turf and moss: beneath which, the old people of the village lay at rest. Oliver often wandered here; and, thinking of the wretched grave in which his mother lay, would sometimes sit him down and sob unseen; but, when he raised his eyes to the deep sky overhead, he would cease to think of her as lying in the ground, and would weep for her, sadly, but without pain.
Oliver Twist Or The Parish Boys Progress
There, upon her little bed, she lay at rest. The solemn stillness was no marvel now.
The Old Curiosity Shop