Revelation 21:8 (KJV)
8 But the fearful, and unbelieving, and the abominable, and murderers, and whoremongers, and sorcerers, and idolaters, and all liars, shall have their part in the lake which burneth with fire and brimstone: which is the second death.
Pro 21:28 A false witness shall perish: but the man that heareth speaketh constantly.
Exo 20:16 Thou shalt not bear false witness against thy neighbour.
Deu 5:20 Neither shalt thou bear false witness against thy neighbour.
Deu 19:16 If a false witness rise up against any man to testify against him that which is wrong;
Deu 19:17 Then both the men, between whom the controversy is, shall stand before the LORD, before the priests and the judges, which shall be in those days;
Deu 19:18 And the judges shall make diligent inquisition: and, behold, if the witness be a false witness, and hath testified falsely against his brother;
Deu 19:19 Then shall ye do unto him, as he had thought to have done unto his brother: so shalt thou put the evil away from among you.
Deu 19:20 And those which remain shall hear, and fear, and shall henceforth commit no more any such evil among you.
Deu 19:21 And thine eye shall not pity; but life shall go for life, eye for eye, tooth for tooth, hand for hand, foot for foot.
Mat 5:38 Ye have heard that it hath been said, An eye for an eye, and a tooth for a tooth:
Mat 5:39 But I say unto you, That ye resist not evil: but whosoever shall smite thee on thy right cheek, turn to him the other also.
Now our Lord here, does not find fault with the law of retaliation, as delivered by Moses, but with the false gloss of the Scribes and Pharisees; who, as they interpreted it of pecuniary mulcts, as a compensation for the loss of a member, which sometimes exceeded all just and due bounds; so they applied it to private revenge, and in favour of it: whereas this law did not allow of a retaliation to be made, by private persons, at their pleasure, but by the civil magistrate only. Gill
…neither this nor what follows were left to the will of a private person to inflict at his pleasure, but to the civil magistrate; and therefore no ways encourages private revenge, in favour of which it was applied by the Pharisees in Christ’s time, whose gloss he refutes, Mat 5:38 nor are the words directed to the offender in this and the following cases, but to Moses, and so to all judges under him and in succession, who were to see these laws put in execution. Gill
Proverbs 21:28 Gill
A false witness shall perish,…. As witness he shall perish in his reputation, no credit shall be given him, he shall not be admitted an evidence, or a witness in any cause, being found a false one; and as a man, he shall be punished in body or estate by the civil magistrate, and his soul shall perish eternally, unless he has true repentance for his sin: or, a witness of lies shall perish (k) it may be applied to any teacher of false doctrine; and to the man of sin, and his followers, that speak lies in hypocrisy; everyone that loves and makes a lie shall die the second death, and be excluded from eternal happiness, Rev 21:8;
but the man that heareth; before he speaks, and speaks what he hears, and does not devise things himself; but witnesses the truth, and nothing else, to the best of his knowledge:
speaketh constantly; invariably and consistently, what is all of a piece, and by which he ah, des; or “continually”, as Jarchi; or “for ever”; he is made use of as a witness as long as he lives, whenever there is occasion for him; the Vulgate Latin version renders it, “he speaks victory”; his testimony, being true and valid, carries the cause: it, nay be applied to a faithful teacher, who hearkens to the word of God, and speaks according to that; such an one speaks out, he doctrine of the word constantly, boldly, with certainty, without any hesitation or staggering.
(k) עד כזבים “testis mendaciorum”, Montanus, Junius & Tremellius, Cocceius, Gejerus, Michaelis, Schultens.