'Dumb' in the Bible

Let the lying lips become dumb, which speak insolently against the righteous in pride and contempt.

But I, as a deaf man, hear not; and am as a dumb man that openeth not his mouth.

I was dumb with silence, I held my peace from good; and my sorrow was stirred.

I was dumb, I opened not my mouth; for thou hast done it.