1 John 4:2

By this ye may know the Spirit of God: every Spirit that confesseth Jesus Christ, who is come in the flesh, is of God:

1 Corinthians 12:3

I must acquaint you, that no one speaking by the Spirit of God, calleth Jesus a curse: and no one can say that Jesus is the Lord, but by the holy Ghost.

John 1:14

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

John 16:13-15

But when the Spirit of truth is come, He will guide you into all truth: for He will not speak of Himself; but whatsoever He shall hear, that will He speak, and will shew you things to come.

1 Timothy 3:16

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

1 John 2:23

for whosoever denieth the Son, hath not the Father: but he that confesseth the Son acknowledgeth the Father also.

1 John 4:3

and every spirit that doth not confess Jesus Christ, who is come in the flesh, is not of God: and this is that spirit of antichrist, which ye have heard was coming, and is already in the world.

1 John 5:1

Whosoever believeth that Jesus is the Christ is born of God: and every one, that loveth Him that begat, loveth Him also that is begotten of 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 doth not confess Jesus Christ, who is come in the flesh, is not of God: and this is that spirit of antichrist, which ye have heard was coming, and is already in the world.
John 1:14
And the Word was made flesh, and dwelt among us, being full of grace and truth: and we beheld his glory, the glory as of the only-begotten of the Father.
1 Timothy 3:16
And without controversy great is the mystery of godliness: God was manifested in the flesh, justified in the Spirit, seen by angels, preached among the Gentiles, believed on in the world, and received up into glory.

General references

John 8:47
He, that is of God, receiveth the words of God; but ye therefore receive them not, because ye are not of God.