hold one's peace
keep one's peace

But until then he was content to hold his peace.

He thought about it for long moments during which time the other held his peace.

She had questions about that, too, but held her peace.

So I decide to hold my peace for a little while longer.

He did not seem to want to talk on the way back and I held my peace.

Speak now or forever hold your peace, as the saying went.

Sam thought it was, too, but he held his peace.

Will you hold your peace and listen well to what I am going to say now?

"Continue to hold your peace, and life will be far easier for you."

Let's hold our peace and wait for them to come back.