Romans 1:9

For God, whom I serve with my spirit in the gospel of his Son, is my witness, how incessantly I make mention of you,

Romans 9:1

I say the truth in Christ, I lie not; my conscience also bearing me witness in the Holy Ghost?

2 Corinthians 1:23

But I call God for a record on my soul, that to spare you, I came not as yet to Corinth.

2 Corinthians 11:31

The God and Father of the Lord Jesus Christ, who is blessed for ever, knoweth that I lie not.

1 Thessalonians 2:5

For neither at any time used we flattering words, as ye know, nor a cloak of covetousness: God is witness:

1 Thessalonians 2:10

Ye are witnesses and God, how holily and justly and unblameably we behaved among you that believe:

Treasury of Scripture Knowledge

Summary

Also now, behold, my witness is in heaven, and my record is on high.

Bible References

My witness

Romans 1:9
For God, whom I serve with my spirit in the gospel of his Son, is my witness, how incessantly I make mention of you,
Romans 9:1
I say the truth in Christ, I lie not; my conscience also bearing me witness in the Holy Ghost?
2 Corinthians 1:23
But I call God for a record on my soul, that to spare you, I came not as yet to Corinth.
2 Corinthians 11:31
The God and Father of the Lord Jesus Christ, who is blessed for ever, knoweth that I lie not.
1 Thessalonians 2:10
Ye are witnesses and God, how holily and justly and unblameably we behaved among you that believe: