Adam Clarke on Job 21:2

Let this be your consolations - ותהי זאת תנחומתיכם uthehi zoth tanchumotheychem may be translated, "And let this be your retractations." Let what I am about to say induce you to retract what you have said, and to recall your false judgments. נחם nacham signifies, not only to comfort, but to change one's mind, to repent; hence the Vulgate translates et agite paenitentiam, "and repent," which Coverdale follows in his version, and amende yourselves. Some suppose the verse to be understood ironically: I am now about to give you consolations for those you have given me. When I have done, then turn them into mockery if you please.