Job 27:4
My lips shall not speak wickedness, nor my tongue utter deceit.
My lips shall not speak wickedness,.... This is the thing he swears to, this the matter of his oath, not only that he would not speak a wicked word not anything corrupt, unsavoury, unchaste, profane, and idle nor speak evil of his neighbours and friends or of any man; but that he would not speak wickedly of himself, as he must do, if he owned himself to be a wicked man and an hypocrite as his friends charged him, and they would have had him confessed; but he swears he would not utter such wickedness as long as he had any breath in him:
nor my tongue utter deceit; which respects the same thing; not merely any fallacy or lie, or what might impose upon and deceive another, which yet he was careful of; but such deceit and falsehood as would be a belying himself, which would be the case should he say that he was devoid of integrity and sincerity.