Jesus did not say anything specifically about Muslims because Islam did not exist during his lifetime.
Here's a more detailed explanation:
Islam emerged in the 7th century CE, with the Prophet Muhammad. Jesus lived in the 1st century CE. Therefore, the Quran, Islamic teachings, and the term "Muslim" were concepts that hadn't yet come into existence.
While Jesus didn't mention Muslims or Islam directly, the New Testament does contain warnings about false prophets and teachers. For instance:
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Matthew 7:15-20: "Beware of false prophets, who come to you in sheep's clothing but inwardly are ravenous wolves... Thus you will recognize them by their fruits."
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Matthew 24:24-25: "For false messiahs and false prophets will appear and perform great signs and wonders to deceive, if possible, even the elect. See, I have told you beforehand."
These passages are often interpreted generally as cautionary advice applicable to any religious figure or teaching that deviates from what is perceived as true doctrine. They are not specifically about Islam, given the chronological context.
In summary, it is anachronistic to expect Jesus to have commented on Islam, as the religion originated centuries after his death.