Your wedding was stressful. You're talking to a friend about it. You're telling her the story of all the stressful things that happened. You end the story this way.
“Don’t feel obligated to stay late. Once you’re done with whatever you're working on, you’re free to leave.”
There's a new employee working under you. It's late in the work day, but most people are still working. You explain to the new person that she doesn't have to stay late.
You're going on vacation. You want to leave a message on your e-mail that lets people know that you're not at work. You write this in your out-of-office message.
You are raising three young children as a single parent while also working full time. You're talking to a coworker who says that it must be hard for you. It is, but you're able to survive. You say this in response.