'Dumb' in the Bible

Then [the] lame shall leap like the deer, and [the] tongue of [the] dumb shall sing for joy, for waters shall break forth in the wilderness and streams in the desert.

He was oppressed and afflicted, yet he did not open his mouth; he was brought like lamb to [the] slaughter, and like a sheep is dumb before its shearers, so he did not open his mouth.

His watchmen [are] blind, none of them know. They [are] all dumb dogs; they are unable to bark, panting, lying down, loving to slumber.