False witnesses are mentioned in the Quran in these verses:
[22:30] Those who reverence the rites decreed by God have deserved a good reward at their Lord. All livestock is made lawful for your food, except for those specifically prohibited for you. You shall avoid the abomination of idol worship, and avoid bearing false witness.
[25:72] They do not bear false witness. When they encounter vain talk, they ignore it.
To learn more, read the Quran in English.
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