All flesh shall perish together - If God chose, he would have a right to cut down the whole race. How then shall people complain of the loss of health, comforts, and friends, and presume to arraign God as if he were unjust?

All flesh shall perish together,.... Not one by one, or one after another, as they generally do, but all together; as when the flood swept away the world of the ungodly. "All flesh" signifies all men, and their bodies of flesh particularly, which are weak, frail, and mortal; and if God gathers or takes out the spirit from them, they die immediately, which is meant by perishing, as in Ecclesiastes 7:15;
and man shall turn again unto dust; from whence he came, as the body does at death; when those earthly tabernacles of the bodies of men, which have their foundation in the dust, are dissolved and sink into it. Now though this is the case of particular persons, one after another, yet it is not a general case, as it would be if God was to exert his power, as he might without any charge of injustice: and this shows the merciful kindness of God to man, so far is he from doing any thing injurious or unjust.

All - The design of this and the foregoing verse is the same with that of Job 34:13, namely, to declare God's absolute and uncontrollable sovereignty over all men.