GOD'S WORD® Translation
Since you want proof that Christ is speaking through me, that's what you'll get. Christ isn't weak in dealing with you. Instead, he makes his power felt among you.

American Standard Version
seeing that ye seek a proof of Christ that speaketh in me; who to you-ward is not weak, but is powerful in you:

Berean Study Bible
since you are demanding proof that Christ is speaking through me. He is not weak in dealing with you, but is powerful among you.

Douay-Rheims Bible
Do you seek a proof of Christ that speaketh in me, who towards you is not weak, but is mighty in you?

English Revised Version
seeing that ye seek a proof of Christ that speaketh in me; who to you-ward is not weak, but is powerful in you:

King James Bible
Since ye seek a proof of Christ speaking in me, which to you-ward is not weak, but is mighty in you.

World English Bible
seeing that you seek a proof of Christ who speaks in me; who toward you is not weak, but is powerful in you.

Young's Literal Translation
since a proof ye seek of the Christ speaking in me, who to you is not infirm, but is powerful in you,

2 Corinthians 13:3 Additional Translations ...