I will cause my fury to rest - My displeasure, and the evidences of it, shall not be transient; they shall be permanent upon you, and among you. And is not this dreadfully true to the present day?
Comforted - In the sense of “consoling oneself” and “feeling satisfaction in punishing;” hence, to “avenge oneself.”
The fury is to “rest” upon them, abide, so as not to pass away. The “accomplishment” of the divine anger is not the “completion” in the sense of bringing it to a close, but in the sense of carrying it out to the full.