1 John 4:14

And we have seen and we testify that the Father has sent forth his Son the Saviour of the world.

John 4:42

and they continued to say to the woman, We no longer believe through your talk; for we have heard and we know that He is truly the Savior of 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.

John 3:16-17

For God so loved the world that He gave His only begotten Son, that every one believing on Him may not perish but have eternal life.

John 15:26-27

When the Comforter, whom I will send to you from the Father, the Spirit of truth, who proceeds from the Father, may come, He will witness concerning me,

1 John 4:10

In him is divine love, not because we loved God with divine love, but because he loved us with divine love, and sent his Son an expiation for our sins.

John 1:29

On the following day he sees Jesus coming to him, and says, Behold the Lamb of God, that taketh away the sin of the world.

John 3:11

Truly, truly, I say unto thee, that we speak what we know, and testify what we have seen; and you received not our testimony.

John 3:32

the one being of the earth is of the earth, and speaks of the earth. The one coming from heaven witnesses what He has seen and heard, and no one receives His testimony.

John 3:34

For whom God sent speaketh the words of God: for He does not give His spirit by measure.

John 5:36-37

But I have a testimony greater than that of John: for the works that the Father hath given me that I may perfect them, these works which I do, testify concerning me, that the Father hath sent me.

John 5:39

Search the Scriptures, because in them ye think ye have eternal life; and they are they which testify concerning me;

John 10:36

whom the Father sanctified and sent into the world, do you say; Thou blasphemest; because I said, I am the Son of God?

John 12:47

And if any one may hear my words, and not keep them, I do not judge him: for I came not that I may judge the world, but that I may save the world.

Acts 18:5

And when both Silas and Timothy came down from Macedonia, Paul was straitened with the word, witnessing to the Jews that Jesus is the Christ.

1 Peter 5:12

Through Silvanus, the faithful brother, as I consider, I have written unto you briefly, exhorting, and witnessing that this same grace of God is true in which you may stand.

1 John 1:1-3

That which was from the beginning, which we have heard, which we have seen with our eyes, which we have beheld, and our hands have handled, concerning the Word of the life;

1 John 2:1-2

My little children, I write these things to you, in order that you may not sin. And if any one may sin, we have an Advocate with the Father, Jesus Christ the righteous:

1 John 5:9

If we receive the witness of men, the witness of God is greater: because this is the witness of God that he has testified concerning his Son.

Treasury of Scripture Knowledge

Summary

And we have seen and do testify that the Father sent the Son to be the Saviour of the world.

General references

Bible References

We have

1 John 1:1
That which was from the beginning, which we have heard, which we have seen with our eyes, which we have beheld, and our hands have handled, concerning the Word of the life;
1 John 5:9
If we receive the witness of men, the witness of God is greater: because this is the witness of God that he has testified concerning his Son.
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 3:11
Truly, truly, I say unto thee, that we speak what we know, and testify what we have seen; and you received not our testimony.
John 5:39
Search the Scriptures, because in them ye think ye have eternal life; and they are they which testify concerning me;
John 15:26
When the Comforter, whom I will send to you from the Father, the Spirit of truth, who proceeds from the Father, may come, He will witness concerning me,
Acts 18:5
And when both Silas and Timothy came down from Macedonia, Paul was straitened with the word, witnessing to the Jews that Jesus is the Christ.
1 Peter 5:12
Through Silvanus, the faithful brother, as I consider, I have written unto you briefly, exhorting, and witnessing that this same grace of God is true in which you may stand.

The father

1 John 4:10
In him is divine love, not because we loved God with divine love, but because he loved us with divine love, and sent his Son an expiation for our sins.
John 3:34
For whom God sent speaketh the words of God: for He does not give His spirit by measure.
John 5:36
But I have a testimony greater than that of John: for the works that the Father hath given me that I may perfect them, these works which I do, testify concerning me, that the Father hath sent me.
John 10:36
whom the Father sanctified and sent into the world, do you say; Thou blasphemest; because I said, I am the Son of God?

General references

Luke 19:10
for the Son of man came to seek and to save that which is lost.