In matters relating to his enemies and those who are envious of him and who seek his harm, he should trust in the Creator. May He be exalted and bear their scorn. He should not pay them back in kind, but with kindnesses and any favor that he can do for them, he should do bearing in mind that his well-being and injury are in the hands of the Creator. May He be exalted.
If his enemies should cause him injury, he should judge them favorably and suspect himself and his deeds of having been previously evil in GD's sight. He should plead before GD and ask Him to forgive his sins. Then his enemies will become his friends as the Wise Man said: "When GD is pleased with a man's ways, He makes even his enemies to be at peace with him." pg 427