New Revised Standard Version
But I have a testimony greater than John’s. The works that the Father has given me to complete, the very works that I am doing, testify on my behalf that the Father has sent me.

Contemporary English Version
But something more important than John speaks for me. I mean the things that the Father has given me to do! All of these speak for me and prove that the Father sent me.

New American Bible
But I have testimony greater than John’s. The works that the Father gave me to accomplish, these works that I perform testify on my behalf that the Father has sent me.

Douay-Rheims Bible
But I have a greater testimony than that of John: for the works which the Father hath given me to perfect, the works themselves which I do, give testimony of me, that the Father hath sent me.

But I have a greater testimony than that of John: for the works which the Father hath given me to perfect, the works themselves which I do, give testimony of me, that the Father hath sent me.

I have.

John 5:32 There is another that beareth witness of me: and I know that the witness which he witnesseth of me is true.

1 John 5:9,11,12 If we receive the testimony of men, the testimony of God is greater. For this is the testimony of God, which is greater, because he hath testified of his Son. . . .

the works.

John 3:2 This man came to Jesus by night and said to him: Rabbi, we know that thou art come a teacher from God; for no man can do these signs which thou dost, unless God be with him.

John 9:30-33 The man answered and said to them: why, herein is a wonderful thing, that you know not from whence he is, and he hath opened my eyes. . . .

John 10:25,37,38 Jesus answered them: I speak to you, and you believe not: the works that I do in the name of my Father, they give testimony of me. . . .

John 11:37 But some of them said: Could not he that opened the eyes of the man born blind have caused that this man should not die?

John 14:10,11 Do you not believe that I am in the Father and the Father in me? The words that I speak to you, I speak not of myself. But the Father who abideth in me, he doth the works. . . .

John 15:24 If I had not done among them the works that no other man hath done, they would not have sin: but now they have both seen and hated both me and my Father.

John 17:4 I have glorified thee on the earth; I have finished the work which thou gavest me to do.

Acts 2:22 Ye men of Israel, hear these words: Jesus of Nazareth, a man approved of God among you by miracles and wonders and signs, which God did by him, in the midst of you, as you also know:

Matthew 11:4 And Jesus making answer said to them: Go and relate to John what you have heard and seen.