1 John 4:2

In this you know the Spirit of God: every spirit which confesses that Jesus Christ has come in the flesh is of God:

John 1:14

The Word was made flesh, and tented among us (and we beheld His glory, the glory as of the only begotten with the Father), full of grace and truth.

John 16:13-15

But when He, the Spirit of truth, may come, He will guide you in all truth: for He will not speak from Himself; but so many things as He hears, He will speak: and will proclaim to you the things which are coming.

1 Timothy 3:16

And assuredly great is the mystery of godliness; Who is manifested in the flesh, was justified in the spirit, was seen of angels, was preached among the Gentiles, was believed on in the world, was taken up in glory.

1 John 2:23

No one denying the Son has the Father: the one confessing the Son has also the Father.

1 John 4:3

and every spirit which does not confess Jesus is not of God: and this is the spirit of antichrist, which you have heard that he is coming; and now he is already in the world.

1 John 5:1

Every one believing that Jesus is the Christ has been born of God: and every one loving with divine love him who begat, also loves him who has been begotten of him, with divine love.

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 which does not confess Jesus is not of God: and this is the spirit of antichrist, which you have heard that he is coming; and now he is already in the world.
John 1:14
The Word was made flesh, and tented among us (and we beheld His glory, the glory as of the only begotten with the Father), full of grace and truth.
1 Timothy 3:16
And assuredly great is the mystery of godliness; Who is manifested in the flesh, was justified in the spirit, was seen of angels, was preached among the Gentiles, was believed on in the world, was taken up in glory.

General references

John 8:47
The one being of God hears the words of God: on account of this you do not hear, because you are not of God.