Galatians 1:20

(Now in what I am writing to you, I assure you as if I were standing before God that I am not lying.)

Romans 9:1

I am telling the truth in Christ, I am not lying, my conscience testifies with me [enlightened and prompted] by the Holy Spirit,

2 Corinthians 11:31

The God and Father of the Lord Jesus, He who is blessed and to be praised forevermore, knows that I am not lying.

2 Corinthians 11:10-11

As the truth of Christ is in me, my boast [of independence] will not be silenced in the regions of Achaia (southern Greece).

Treasury of Scripture Knowledge

Summary

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

Bible References

Behold

Romans 9:1
I am telling the truth in Christ, I am not lying, my conscience testifies with me [enlightened and prompted] by the Holy Spirit,
2 Corinthians 11:10
As the truth of Christ is in me, my boast [of independence] will not be silenced in the regions of Achaia (southern Greece).