GOD'S WORD® Translation
(God is my witness that what I'm writing is not a lie.)

American Standard Version
Now touching the things which I write unto you, behold, before God, I lie not.

Berean Study Bible
I assure you before God that what I am writing to you is no lie.

Douay-Rheims Bible
Now the things which I write to you, behold, before God, I lie not.

English Revised Version
Now touching the things which I write unto you, behold, before God, I lie not.

King James Bible
Now the things which I write unto you, behold, before God, I lie not.

World English Bible
Now about the things which I write to you, behold, before God, I'm not lying.

Young's Literal Translation
And the things that I write to you, lo, before God -- I lie not;

Galatians 1:20 Additional Translations ...