'Dumb' in the Bible

then shall the lame man leap as a hart, and the tongue of the dumb sing: for in the wilderness shall waters break out, and torrents in the desert.

He was oppressed, and he was afflicted, but he opened not his mouth; he was led as a lamb to the slaughter, and was as a sheep dumb before her shearers, and he opened not his mouth.

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