A:
The ninth commandment forbiddeth whatsoever is prejudicial to truth,1
or injurious to our own, or our neighbour's good name.2

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Proverbs 19:5.
A false witness shall not be unpunished, and he that speaketh lies shall not escape.
Proverbs 6:16-19.
These six things doth the Lord hate: yea, seven are an abomination unto him: a proud look, a lying tongue, and hands that shed innocent blood, an heart that
deviseth wicked imaginations, feet that be swift in running to mischief, a false witness thatspeaketh lies, and he that soweth discord among
brethren.
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1 Samuel 17:28.
And Eliab his eldest brother heard when he spake unto the men; and Eliab's anger was kindled against David, and he said,
Why camest thou down hither? and with whom hast thou left those few sheep in the wilderness? I know thy pride, and the naughtiness of thine
heart; for thou art come down that thou mightest see the battle.
Leviticus 19:16.
Thou shalt not go up and down as a talebearer among thy
people: neither shalt thou stand against the blood of thy neighbour: I am the Lord.
Luke 3:14.
And the soldiers likewise demanded of him,
saying, And what shall we do? And he said unto them, Do violence to no man, neither accuse any falsely; and be content with your wages.
Psalm 15:3.
He that backbiteth not with his tongue, nor doeth evil to his neighbour, nor taketh up a reproach against his neighbour.