lay something to rest
US /leɪ ˈsʌm.θɪŋ tuː rɛst/
UK /leɪ ˈsʌm.θɪŋ tuː rɛst/

1.
mettre fin à, enterrer
to put an end to something, especially a rumor, doubt, or problem
:
•
The company issued a statement to lay the rumors to rest.
L'entreprise a publié un communiqué pour mettre fin aux rumeurs.
•
We need to discuss this issue and finally lay it to rest.
Nous devons discuter de cette question et enfin y mettre un terme.