do not disturb
Used to indicate that somebody does not wish to be disturbed, e.g. a sign on a hotel room door, or a "busy" mode of an instant messenger.
My legal wife is to me dead; the only ecclesiastical authority I recognise pronounces me free; the attacks and threats of men do not disturb me. I am acting according to a clear conscience, and am doing hurt to no man. For my conduct, I will answer to my maker. William the Silent
Let anger pass, make a place for it; do not impede its progress; do not disturb its development, give it the time it needs to die out, open a wide path for it. Joseph Joubert
Do not disturb my circles! Archimedes
The mind is seldom quickened to very vigorous operations but by pain, or the dread of pain. We do not disturb ourselves with the detection of fallacies which do us no harm. Samuel Johnson
Big Sur also brings a new control feature for functions such as Do Not Disturb, keyboard brightness, and more, which is accessible from the menu bar. Source: Internet
One big change is the new keyboard on MacBook Air that carries dedicated shortcut keys for features such as Spotlight, Dictation, and Do Not Disturb. Source: Internet