A. Ignore it if you can; don't be offended:

ECC 7:21. Also take no heed unto all words that are spoken; lest thou hear thy servant curse thee:

ECC 7:22. For oftentimes also thine own heart knoweth that thou thyself likewise hast cursed others.

PSA 119:165. Great peace have they which love thy law: and nothing shall offend them.

B. Don't speak evil of them in return:

1PE 2:21. For even hereunto were ye called: because Christ also suffered for us, leaving us an example, that ye should follow his steps:

1PE 2:22. Who did no sin, neither was guile found in his mouth:

1PE 2:23. Who, when he was reviled, reviled not again; when he suffered, he threatened not; but committed himself to him that judgeth righteously:

ISA 53:7. He was oppressed, and he was afflicted, yet he opened not his mouth: he is brought as a lamb to the slaughter, and as a sheep before her shearers is dumb, so he openeth not his mouth.

ISA 53:9. And he made his grave with the wicked, and with the rich in his death; because he had done no violence, neither was any deceit in his mouth.

1PE 3:9. Not rendering evil for evil, or railing for railing: but contrariwise blessing; knowing that ye are thereunto called, that ye should inherit a blessing.

C. Let your good works disprove their lies:

TIT 2:7. In all things shewing thyself a pattern of good works: in doctrine shewing uncorruptness, gravity, sincerity,

TIT 2:8. Sound speech, that cannot be condemned; that he that is of the contrary part may be ashamed, having no evil thing to say of you.

1PE 2:12. Having your conversation honest among the Gentiles: that, whereas they speak against you as evildoers, they may by your good works, which they shall behold, glorify God in the day of visitation.

1PE 2:15. For so is the will of God, that with well doing ye may put to silence the ignorance of foolish men:

1PE 3:16. Having a good conscience; that, whereas they speak evil of you, as of evildoers, they may be ashamed that falsely accuse your good conversation in Christ.

D. Jesus remained silent before His accusers:

ISA 53:7. He was oppressed, and he was afflicted, yet he opened not his mouth: he is brought as a lamb to the slaughter, and as a sheep before her shearers is dumb, so he openeth not his mouth.

MAT 27:14. And he answered him to never a word; insomuch that the governor marvelled greatly.

LUK 23:9. Then he questioned with him in many words; but he answered him nothing.

LUK 22:67. Art thou the Christ? tell us. And he said unto them, If I tell you, ye will not believe:

LUK 22:68. And if I also ask you, ye will not answer me, nor let me go.

E. But there are times to speak out & give answer:

ACT 21:40. And when he had given him licence, Paul stood on the stairs, and beckoned with the hand unto the people. And when there was made a great silence, he spake unto them in the Hebrew tongue, saying,

ACT 24:10. Then Paul, after that the governor had beckoned unto him to speak, answered, Forasmuch as I know that thou hast been of many years a judge unto this nation, I do the more cheerfully answer for myself:

ACT 26:1. Then Agrippa said unto Paul, Thou art permitted to speak for thyself. Then Paul stretched forth the hand, and answered for himself:

1PE 3:15. But sanctify the Lord God in your hearts: and be ready always to give an answer to every man that asketh you a reason of the hope that is in you with meekness and fear:

MAT 10:18. And ye shall be brought before governors and kings for my sake, for a testimony against them and the Gentiles.

MAT 10:19. But when they deliver you up, take no thought how or what ye shall speak: for it shall be given you in that same hour what ye shall speak.