From openbible.info
1Peter 5:8Be sober-minded; be watchful. Your adversary the devil prowls around like a roaring lion, seeking someone to devour.
1John 4:1-3Beloved, do not believe every spirit, but test the spirits to see whether they are from God, for many false prophets have gone out into the world. By this you know the Spirit of God: every spirit that confesses that Jesus Christ has come in the flesh is from God, and every spirit that does not confess Jesus is not from God. This is the spirit of the antichrist, which you heard was coming and now is in the world already.

From biblehub.com Luke 8:17For nothing is secret, that shall not be made manifest; neither any thing hid, that shall not be known and come abroad.

Revelation 13:18 Here is wisdom. Let him that hath understanding count the number of the beast: for it is the number of a man; and his number is Six hundred threescore and six.