9 Even that it would please God to destroy me; that he would let loose his hand, and cut me off!
[AD 398] Didymus the Blind on Job 6:8-10
He who asks to be wounded does not pray out of exhaustion that his prayer might be granted but in order to fulfill his task. This task was to fulfill the right deeds or to make visible to the friends for their benefit the reason for the hardships, [namely,] that they had been imposed as a test. Then they would not make mistakes against the righteous. Instead, with divine zeal they would be committed to emulate the endurance and steadfastness that the holy one exhibited and that led him to say, “O that I might have my request,” rather than … “that God would grant my desire.” Job prays for two reasons. On the one hand, he prays that he himself may win the crown in the competition. On the other hand, Job prays that his friends may not consider his endurance in hardship as meaningless. His steadfastness even in such great hardships can be seen and admired in the fact that Job did not deny his friend an answer, even though preoccupation with his hardships could have served as an excuse. But even now Job speaks like a brave athlete who warlike meets his opponent, and with the consciousness that the imposed suffering did not occur without God’s compliance. “That it would please God to crush me,” yet “may he not extinguish me entirely,” instead of, “May God mercifully allow me to endure the affliction until the end.” Similar to this is the expression “and lead us not into temptation,” which often has been interpreted in this way: “May it not come so far that we fall prey to the temptations.”

[AD 407] John Chrysostom on Job 6:8-10
“I do not care to oppose your words,” Job says. “It seems to me, in fact, that I have committed nothing resembling what you say. I don’t state this openly. I simply say that I am suffering punishments that go beyond what human nature can endure. The vastness of my temptations extends far beyond what human bodies can actually bear.” However, observe how, even in the midst of such grief, Job has not decided, in any case, to come and relate his good actions. He has hidden them so far. In addition, he who often with great honesty exposed his fault to public mockery before a brilliant audience is silent about his good actions, even while living in such misery. In fact, Job does not say, “I experienced these sufferings, even though I am righteous.” Rather, Job says he cannot bear them.… His language is not that of a man who asserts that he is unjustly punished but that of one who recognizes, on the contrary, the justness of his punishment. He simply cannot bear any more punishment and therefore demands that he obtain forgiveness.

[AD 850] Ishodad of Merv on Job 6:8-10
“He would let loose his hand and finish me!” That is, may he put an end to my life by his intervention. Again Job speaks, “I would be finished again with violence and no mercy.” In a word, “I desire that God inflict death on me violently and mercilessly.

[AD 604] Gregory the Dialogist on Job 6:9
20. For very often the Lord begins to work in us the bruising of our vicious habits, but when the mind is lifted up at the very first step of its progress, and when it already exalts itself as on the ground of its virtuous attainments, it opens an entrance to the adversary, that rages against it, who penetrating into the depths of the heart, dashes in pieces all that he may find therein springing from the earnestness of a good beginning, and shows himself the more violent in the breaking of it in proportion as he is the sorer grieved that it had made progress, though but a little way. Whence too, as the Gospel is witness, by the voice of ‘Truth,’ the unclean spirit, which went out alone, returns with seven other spirits to the neglected dwelling-place of the conscience. Lest then, after the beginnings of divine correction, the old adversary snatch him unawares, and drag him along for the breaking in pieces of his virtues, the holy man fitly beseeches, saying, That He That hath begun would bruise me. As if he said in plain words, ‘That which He has begun in me may He not cease to perfect by smiting me, lest He deliver me over forsaken to the adversary to bruise me.’ Hence it is fitly subjoined,
That He would let loose His hand, and cut me off.
21. For oftentimes being swoln with the confidence of lengthened prosperity, we are lifted up in a certain kind of frame of self-elation, and when our Creator sees that we are lifted up, but does not exercise His love towards us by stripes, He as it were keeps His hand hid, as to the smiting of our evil ways. Did He not tie the hand of His affection, when He said to the people, when guilty of transgression, I will not any more be wroth with thee; and, My jealousy is departed from thee. [Ezek. 16, 42] Therefore, ‘That He would let loose His hand,’ means, ‘that He would exercise His affection.’ And it is rightly added, ‘and cut me off.’ For whenever either the sudden pain of the scourge, or the trial of our weakness, falls upon us in a state of security, and elated with the abundance of our virtuous attainments, the pride of our hearts, being cut down, is precipitated from the height of its seat, so that it dares do nothing of itself, but levelled by the blow of its frailty, seeks the hand of one to lift it. Hence it is that, when holy men are looked upon with admiration on the grounds of the secret dispensation of God's providence towards them, they the more dread their very prosperity itself: they long to be subjected to trial, they covet to be stricken, that fear and pain may discipline the unwary mind, lest when an enemy breaketh out of ambush on this road of our pilgrimage, its self-security cause its greater downfal. Hence the Psalmist says, Examine me, O Lord, and prove me. [Ps. 26, 2] Hence he says again, For I am ready for the scourges. [Ps. 38, 17] For because holy men see that the wound of their inward corruption [b] cannot be without putridity, they gladly set them under the hand of the physician for lancing, that the wound being opened, the venom of sin may run out, which, with a whole skin, was inwardly working their destruction.