Contradiction with Proverbs 12:22
Lying lips are an abomination to the LORD, but Matthew 28:14 involves a lie being spread for a reward.
Proverbs 12:22: Lying lips [are] abomination to the LORD: but they that deal truly [are] his delight.
Contradiction with Exodus 20:16
Thou shalt not bear false witness, which contradicts the spreading of false testimony in Matthew 28:14.
Exodus 20:16: Thou shalt not bear false witness against thy neighbour.
Contradiction with Ephesians 4:25
Encourages speaking truth, which conflicts with the deceptive actions endorsed in Matthew 28:14.
Ephesians 4:25: Wherefore putting away lying, speak every man truth with his neighbour: for we are members one of another.
Contradiction with Colossians 3:9
Admonishes against lying to one another, contrasting with the deceit in Matthew 28:14.
Colossians 3:9: Lie not one to another, seeing that ye have put off the old man with his deeds;
Contradiction with Psalm 101:7
States that deceitful people shall not dwell in God’s house, contrasting the approval in Matthew 28:14.
Psalm 101:7: He that worketh deceit shall not dwell within my house: he that telleth lies shall not tarry in my sight. [shall not tarry: Heb. shall not be established]
Contradiction with Proverbs 19:5
A false witness will not go unpunished, yet Matthew 28:14 incentivizes bearing false witness.
Proverbs 19:5: A false witness shall not be unpunished, and [he that] speaketh lies shall not escape. [unpunished: Heb. held innocent]
Contradiction with Revelation 21:8
Mentions liars having their part in the lake of fire, conflicting with the lie encouraged in Matthew 28:14.
Revelation 21:8: 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.
Contradiction with Zechariah 8:16
Commands speaking truth to others, which Matthew 28:14 fails to uphold with its deceit.
Zechariah 8:16: These [are] the things that ye shall do; Speak ye every man the truth to his neighbour; execute the judgment of truth and peace in your gates: [execute...: Heb. judge truth, and the judgment of peace]