'Sheep for the Slaughter' in the Bible

Yea, for thy sake are we killed all the day long; we are counted as sheep for the slaughter.

He was pressed, and he was afflicted, and he will not open his mouth: he was brought as a sheep for the slaughter, and as a sheep before his shearers being dumb and he will not open his mouth.

But thou, O LORD, knowest me: thou hast seen me, and tried mine heart toward thee: pull them out like sheep for the slaughter, and prepare them for the day of slaughter.

The passage of the scripture which he was reading, was this: As a sheep for the slaughter was he led; and as a lamb before his shearer is dumb, so opened he not his mouth

As it is written, For thy sake we are killed all the day long; we are accounted as sheep for the slaughter.