Thou shalt not bear false witness, etc. - Not only false oaths, to deprive a man of his life or of his right, are here prohibited, but all whispering, tale-bearing, slander, and calumny; in a word, whatever is deposed as a truth, which is false in fact, and tends to injure another in his goods, person, or character, is against the spirit and letter of this law. Suppressing the truth when known, by which a person may be defrauded of his property or his good name, or lie under injuries or disabilities which a discovery of the truth would have prevented, is also a crime against this law. He who bears a false testimony against or belies even the devil himself, comes under the curse of this law, because his testimony is false. By the term neighbor any human being is intended, whether he rank among our enemies or friends.

Thou shalt not bear false (m) witness against thy neighbour.
(m) But further his good name, and speak truth.

Thou shall not bear false witness against thy neighbour. Neither publicly in a court of judicature, by laying things to his charge that are false, and swearing to them, to his hurt and damage; nor privately, by whispering, tale bearing, backbiting, slandering, by telling lies of him, traducing his character by innuendos, sly insinuations, and evil suggestions, whereby he may suffer in his character, credit, and reputation, and in his trade and business; Aben Ezra thinks the words describe the character of the person that is not to bear witness in any court, and to be read thus, "thou shall not answer who art a false witness": or, "O thou false witness": meaning that such an one should not be admitted an evidence in court, who had been convicted already of being a false witness; his word and oath are not to be taken, nor should any questions be put to him, or he suffered to answer to any; his depositions should have no weight with those before whom they were made, nay, even they should not be taken, nor such a person be allowed to make any; but this is to put this precept in a quite different form from all the rest, and without any necessity, since the word may as well be taken for a testimony bore, as for the person that bears it: this is the ninth commandment.

Thou shalt not bear false witness - This forbids, Speaking falsely in any matter, lying, equivocating, and any way devising and designing to deceive our neighbour. Speaking unjustly against our neighbour, to the prejudice of his reputation; And (which is the highest offence of both these kinds put together) Bearing false witness against him, laying to his charge things that he knows not, either upon oath, by which the third commandment, the sixth or eighth, as well as this, are broken, or in common converse, slandering, backbiting, tale - bearing, aggravating what is done amiss, and any way endeavouring to raise our own reputation upon the ruin of our neighbor's.