Job 17:16

They shall go down to the bars of the pit,.... He himself, and his friends, and the hopes they would have him entertain; these should all go down together to the grave, and there lie barred and locked up; these hopes, so as never to rise anymore, and the bodies of himself, and his friends, till loosed by him who has the keys of hell and death: or "the bars shall go down to the grave"; the members of his body, as Jarchi, which are the bars of it, as some in Bar Tzemach; the strength and support of it, as particularly the bones, these shall go down to the grave, and there turn to rottenness and dust; and therefore, as if he should say, as he elsewhere does, "what is my strength, that I should hope?" Job 6:11;

when [our] rest together [is] in the dust; which is man's original, and to which he returns, and in which the dead lie and sleep until the resurrection; and where they are at rest from all adversity and affliction of body, mind, and estate; from all the troubles and vexations occasioned by wicked men, and from all disputes, wranglings, contentions, and animosities among friends, which would be the case of Job, and his friends, when their heads were laid in the dust, and which he supposed would quickly be; and therefore it was in vain for them to feed him with hopes of outward happiness, and for him to entertain them; it best came them both to think of death and the grave as near at hand, where their controversies would be buried, and they would be good friends, and lie quietly together, and take their rest until they should awake and rise to everlasting life.