New Revised Standard Version
“When the Advocate comes, whom I will send to you from the Father, the Spirit of truth who comes from the Father, he will testify on my behalf.

Contemporary English Version
I will send you the Spirit who comes from the Father and shows what is true. The Spirit will help you and will tell you about me.

New American Bible
“When the Advocate comes whom I will send you from the Father, the Spirit of truth that proceeds from the Father, he will testify to me.

Douay-Rheims Bible
But when the Paraclete cometh, whom I will send you from the Father, the Spirit of truth, who proceedeth from the Father, he shall give testimony of me.

But when the Paraclete cometh, whom I will send you from the Father, the Spirit of truth, who proceedeth from the Father, he shall give testimony of me.

when.

John 14:16,17,26 And I will ask the Father: and he shall give you another Paraclete, that he may abide with you for ever: . . .

John 16:7,13,14 But I tell you the truth: it is expedient to you that I go. For if I go not, the Paraclete will not come to you: but if I go, I will send him to you. . . .

Luke 24:49 And I send the promise of my Father upon you: but stay you in the city till you be endued with power from on high.

Acts 2:33 Being exalted therefore by the right hand of God and having received of the Father the promise of the Holy Ghost, he hath poured forth this which you see and hear.

which.

John 8:42 Jesus therefore said to them: If God were your Father, you would indeed love me. For from God I proceeded and came. For I came not of myself: but he sent me.

Revelation 22:1 And he shewed me a river of water of life, clear as crystal, proceeding from the throne of God and of the Lamb.

he.

John 16:14,15 He shall glorify me: because he shall receive of mine and shall shew it to you. . . .

Acts 2:32,33 This Jesus hath God raised again, whereof all we are witnesses. . . .

Acts 5:32 And we are witnesses of these things: and the Holy Ghost, whom God hath given to all that obey him.

Acts 15:8 And God, who knoweth the hearts, gave testimony, giving unto them the Holy Ghost, as well as to us:

1 Corinthians 1:6 As the testimony of Christ was confirmed in you,

Hebrews 2:4 God also bearing them witness by signs and wonders and divers miracles and distributions of the Holy Ghost, according to his own will.

1 John 5:6-10 This is he that came by water and blood, Jesus Christ: not by water only but by water and blood. And it is the Spirit which testifieth that Christ is the truth. . . .