Bible Verses about “false doctrine”

“Beloved, don't believe every spirit, but test the spirits, whether they are of God, because many false prophets have gone out into the world.”

“And no wonder, for even Satan masquerades as an angel of light.”

“It is no great thing therefore if his servants also masquerade as servants of righteousness, whose end will be according to their works.”

“For such men are false apostles, deceitful workers, masquerading as Christ's apostles.”