Do not repay evil with evil or insult with insult. On the contrary, repay evil with blessing, because to this you were called so that you may inherit a blessing.
NIV
Never return evil for evil or insult for insult (scolding, tongue-lashing, berating), but on the contrary blessing [praying for their welfare, happiness, and protection, and truly pitying and loving them]. For know that to this you have been called, that you may yourselves inherit a blessing [from God--that you may obtain a blessing as heirs, bringing welfare and happiness and protection].
AMP
Not rendering evil for evil, or railing for railing: but contrariwise blessing; knowing that ye are thereunto called, that ye should inherit a blessing.
KJV