Adam Clarke on Job 19:2

How long will ye vex my soul - Every thing that was irritating, vexatious, and opprobrious, his friends had recourse to, in order to support their own system, and overwhelm him. Not one of them seems to have been touched with a feeling of tenderness towards him, nor does a kind expression drop at any time from their lips! They were called friends; but this term, in reference to them, must be taken in the sense of cold-blooded acquaintances. However, there are many in the world that go under the sacred name of friends, who, in times of difficulty, act a similar part. Job's friends have been, by the general consent of posterity, consigned to endless infamy. May all those who follow their steps be equally enrolled in the annals of bad fame!