Job 21:5

And they said to him, “Be silent; put your hand over your mouth and come with us and be to us a father and a priest. Is it better for you to be a priest to the house of one man or to be priest to a tribe and a family in Israel?”

“O that you would be completely silent, And that it would become your wisdom!

“The princes stopped talking And put their hands on their mouths;

“Behold, I am insignificant; what can I respond to You? I place my hand over my mouth.

If you have been wickedly foolish in lifting yourself up, Or if you have schemed evil, put your hand on your mouth.

Thus He will sprinkle many nations, Kings will shut their mouths on account of Him; For what had not been told them they will see, And what they had not heard they will understand.