Who shall reprove his way to his face? and who shall repay him what he hath done?

Who doth declare to his face his way? And for that which he hath done, Who doth give recompence to him?

Who will make his way clear to his face? and if he has done a thing, who gives him punishment for it?

Who shall declare his way to his face? - That is, the face of the wicked. Who shall dare to rise up and openly charge him with his guilt? The idea is, that none would dare to do it, and that, therefore, the wicked man was not punished according to his character here, and was reserved to a day of future wrath.
And who shall repay him what he hath done? - The meaning is, that many wicked people lived without being punished for their sins. No one was able to recompense them for the evil which they had done, and consequently they lived in security and prosperity. Such were the tyrants and conquerors, who had made the world desolate.

Who shall declare his way to his face? - But while the wicked is in power, who shall dare to tell him to his face what his true character is? or, who shall dare to repay him the evil he has done? As such a person cannot have his punishment in this life, he must have it in another; and for this the day of wrath - the day of judgment, is prepared.

Who shall declare his way (s) to his face? and who shall repay him [what] he hath done?
(s) Though men flatter him, and no one dares to reprove him in this world, yet death is a token that he will bring him to an account.

Who shall declare his way to his face?.... Jarchi and Aben Ezra think that Job here returns to God, and speaks of him, as in Job 21:22; signifying that no man can or ought to presume to charge the ways of God in his providence with inequality or injustice, in sparing the wicked now, and reserving them to wrath and destruction hereafter; since he is a sovereign Being, and does what he pleases, and none can hinder him, nor ought any to say to him, what dost thou? nor does he give an account of his matters to the children of men; but this respects the wicked man, and describes his state and condition in this life, as being possessed of such wealth and riches, and living in such grandeur and splendour, and advanced to such places of honour and glory, as to be above the reproof of men; though his way, his course of life, is a very wicked one, and he ought to be told to his face the evil of his way, and the danger he is exposed to by it, and what will be the sad consequence of it; his relations and friends, his neighbours and acquaintance, should labour to convince him of his evil, and reprove him to his face, and endeavour to reclaim him from it; but how few are there that have courage and faithfulness enough to do this, since they are sure to incur his displeasure and hatred, and run the risk of their lives, as John the Baptist lost his for his faithfulness in reproving Herod to his face, for taking to him his brother Philip's wife? Matthew 14:3;
and who shall repay him what he hath done? bring him to an account for his crimes, and to just punishment for them; who will venture to bring a charge against him, or enter an action at law, bring him before a court of judicature, and prosecute him, and get judgment passed upon him? as such a man is above all reproof for his sins, he is out of the reach of punishment for them; he lives with impunity, none can punish him but God; and being lifted up with his greatness, he neither fears God nor regards man.

That is, who dares to charge him openly with his bad ways? namely, in this present life. He shall, I grant (Job 21:30), be "repaid" hereafter.

Declare - His power and splendor are so great, that scarce any man dare reprove him.