1 John 4:2

By this you know the Spirit of God: every Spirit that confesses that Jesus Christ has come in the flesh is of God,

1 Corinthians 12:3

Therefore I tell you that no one who is speaking by the Spirit of God says, "Jesus be cursed," and no one can say, "Jesus is Lord," except by the Holy Spirit.

John 1:14

And the Word became flesh and dwelt among us, and we have seen his glory, the glory as of the only begotten from the Father, full of grace and truth.

John 16:13-15

But when he, the Spirit of truth, comes, he will guide you into all truth; for he will not speak on his own authority, but whatever he hears he will speak; and he will tell you things to come.

1 Timothy 3:16

By common confession, great is the mystery of godliness: he was revealed in the flesh, was vindicated in the Spirit, seen by angels, preached among the nations, believed on in the world, taken up in glory.

1 John 2:23

No one who denies the Son has the Father; whoever acknowledges the Son has the Father also.

1 John 4:3

and every spirit which does not confess Jesus is not of God. This is the spirit of the Antichrist, of which you have heard that it was coming, and now it is in the world already.

1 John 5:1

Everyone who believes that Jesus is the Christ is born of God, and everyone who loves the parent loves the child.

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. This is the spirit of the Antichrist, of which you have heard that it was coming, and now it is in the world already.
John 1:14
And the Word became flesh and dwelt among us, and we have seen his glory, the glory as of the only begotten from the Father, full of grace and truth.
1 Timothy 3:16
By common confession, great is the mystery of godliness: he was revealed in the flesh, was vindicated in the Spirit, seen by angels, preached among the nations, believed on in the world, taken up in glory.

General references

John 8:47
He who is of God hears the words of God; the reason you do not hear them is that you are not of God."