LCDcentral.com | PO Box 220 | Perry, ME | 04667 | United States of America
Let sleeping dogs lie.
Meaning: Don’t talk about a bad situation people have forgotten and that could unnecessarily create problem in the present.
Example: X: Should I ask the professor if he is upset about my late submission of the assignment? Y: If he hasn’t said anything, then don’t bring forth the topic – let sleeping dogs lie.