Romans 1:9
I call God to witness--to whom I render priestly and spiritual service by telling the Good News about His Son-- how unceasingly I make mention of you in His presence,
Romans 9:1
I am telling you the truth as a Christian man--it is no falsehood, for my conscience enlightened, as it is, by the Holy Spirit adds its testimony to mine--
2 Corinthians 1:23
But as for me, as my soul shall answer for it, I appeal to God as my witness, that it was to spare you pain that I gave up my visit to Corinth.
2 Corinthians 11:31
The God and Father of our Lord Jesus Christ--He who is blessed throughout the Ages--knows that I am speaking the truth.
1 Thessalonians 2:5
For, as you are well aware, we have never used the language of flattery nor have we found pretexts for enriching ourselves--God is our witness;
1 Thessalonians 2:10
You yourselves are witnesses--and God is witness--how holy and upright and blameless our dealings with you believers were.