1 John 4:2

By this ye know the Spirit of God: Every spirit that confesseth that Jesus Christ hath come in the flesh, is from God:

1 Corinthians 12:3

Wherefore I give you to understand, that no man speaking by the Spirit of God, calleth Jesus accursed: and that no man can say that Jesus is the Lord, but by the Holy Spirit.

John 1:14

And the Word was made flesh, and dwelt among us, (and we beheld his glory, the glory as of the only begotten of the Father,) full of grace and truth.

John 16:13-15

But, when he, the Spirit of truth is come, he will guide you into all the truth: for he will not speak from himself; but whatever he shall hear, that will he speak: and he will show you things to come.

1 Timothy 3:16

And without controversy, great is the mystery of godliness: God was manifest in the flesh, justified in the Spirit, seen by angels, preached to the Gentiles, believed on in the world, received up into glory.

1 John 2:23

Whoever denieth the Son, the same hath not the Father: but he that acknowledgeth the Son hath the Father also.

1 John 4:3

And every spirit that confesseth not that Jesus Christ is come in the flesh, is not from God. And this is that spirit of antichrist, of which ye have heard that it should come; and even now already it is in the world.

1 John 5:1

Whoever believeth that Jesus is the Christ, is born of God: and every one that loveth him that begat, loveth him also that is begotten by him.

Treasury of Scripture Knowledge

Summary

Hereby know ye the Spirit of God: Every spirit that confesseth that Jesus Christ is come in the flesh is of God:

General references

Bible References

Come

1 John 4:3
And every spirit that confesseth not that Jesus Christ is come in the flesh, is not from God. And this is that spirit of antichrist, of which ye have heard that it should come; and even now already it is in the world.
John 1:14
And the Word was made flesh, and dwelt among us, (and we beheld his glory, the glory as of the only begotten of the Father,) full of grace and truth.
1 Timothy 3:16
And without controversy, great is the mystery of godliness: God was manifest in the flesh, justified in the Spirit, seen by angels, preached to the Gentiles, believed on in the world, received up into glory.

General references

Deuteronomy 18:21
And if thou shalt say in thy heart, How shall we know the word which the LORD hath not spoken?
John 8:47
He that is of God, heareth God's words: ye therefore hear them not, because ye are not of God.