'Dumb' in the Bible

Then shall the lame man leap as a hart, and the tongue of the dumb shall sing; for in the wilderness shall waters break out, and streams in the desert.

He was oppressed, yet when he was afflicted he opened not his mouth; as a lamb that is led to the slaughter, and as a sheep that before its shearers is dumb, so he opened not his mouth.

His watchmen are blind, they are all without knowledge; they are all dumb dogs, they cannot bark; dreaming, lying down, loving to slumber.