'Brook' in the Bible

Why is my pain perpetual, and my wound incurable, which refuses to be healed? will you indeed be to me as a deceitful [brook], as waters that fail?

The whole valley of the dead bodies and of the ashes, and all the fields to the brook Kidron, to the corner of the horse gate toward the east, shall be holy to Yahweh; it shall not be plucked up, nor thrown down any more forever.