Philo Judaeus De Cherubim 15

[15] On the other hand, for a physician not to tell the exact truth to a sick patient, when he has decided on purging ^{1 2} him, or performing some operation with the knife or with the cautery for the benefit of the patient, lest if the sick man were to be moved too strongly by the anticipation of the suffering, he might refuse to submit to the cure, or through weakness of mind might despair of its succeeding; or in the case of a wise man giving false information to the enemy to secure the safety of his country, fearing lest through his speaking the truth the affairs of the adversaries should succeed, in this case an action which is not intrinsically right is done in a proper manner. In reference to which distinction Moses says, "to pursue what is just justly," ³ as if it were possible also to pursue it unjustly, if at any time the judge who gives sentence does not decide in an honest spirit.