How do we know the existence of false religions is warned against in the Bible?

In Revelation, particularly in chapter 13, the second beast symbolizes false religion, which appears humble and trustworthy yet leads many away from the truth of Christ. This deception is highlighted in the scripture where the beast performs wonders to seduce the inhabitants of the earth into worshiping it instead of God. Additionally, throughout the Bible, we are warned about being led astray by false teachings and doctrines that corrupt the hearts and minds of believers. Apostolic writings, like those of Paul, also caution against being seduced by such false religions that lure individuals away from the true faith.