Romans 9:1

I speak the truth in Christ, I lie not, my conscience bearing me testimony in the Holy Spirit,

Galatians 1:20

With respect to the things which I now write to you, behold, before God I lie not.

1 Timothy 2:7

to give which testimony I have been appointed a preacher and an apostle; (I speak the truth, and lie not;) a teacher of the Gentiles in faithfulness and in truth.

Romans 1:9

For God is my witness, whom I serve with my spirit in the gospel of his Son, that, without ceasing, I make mention of you,

Romans 8:16

The Spirit itself testifies with our spirit, that we are the children of God;

2 Corinthians 11:10

As the truth of Christ is in me, this boasting shall not be silenced, in my case, in the regions of Achaia.

2 Corinthians 12:19

Do you think again that we offer you a defense of ourselves? We speak all these things before God in Christ, beloved, for your edification.

Romans 2:15

For when the Gentiles, who have not a law, do, by nature, the things of the law, these who have not a law, are a law to themselves,

2 Corinthians 1:12

For the ground of our rejoicing is this: the testimony of our conscience that we have lived in the world more abundantly, indeed, for you in sincerity and godly purity, not in carnal wisdom, but in the grace of God.

2 Corinthians 1:23

But I call on God as a witness against my soul, that wishing to spare you, I did not go to Corinth;

2 Corinthians 11:31

The God and Father of our Lord Jesus Christ, who is blessed for ever, knows that I do not lie.

Philippians 1:8

For God is my witness how ardently I love you with the affection of Christ Jesus.

1 Thessalonians 2:5

For neither nattering words did we at any time use, as you know, nor a pretext for covetousness; God is witness:

1 Timothy 1:5

(Now the end of the commandment is love out of a pure heart, and out of a good conscience, and out of faith unfeigned:

1 Timothy 5:21

I charge you before God, and the Lord Jesus Christ, and the elect angels, that you observe these things without prejudice, and that you do nothing by partiality.

1 John 3:19-21

And by this we know that we are of the truth; and we shall have our hearts at rest before him:

Treasury of Scripture Knowledge

Summary

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

General references

Bible References

I say

Romans 1:9
For God is my witness, whom I serve with my spirit in the gospel of his Son, that, without ceasing, I make mention of you,
2 Corinthians 1:23
But I call on God as a witness against my soul, that wishing to spare you, I did not go to Corinth;
2 Corinthians 11:31
The God and Father of our Lord Jesus Christ, who is blessed for ever, knows that I do not lie.
2 Corinthians 12:19
Do you think again that we offer you a defense of ourselves? We speak all these things before God in Christ, beloved, for your edification.
Galatians 1:20
With respect to the things which I now write to you, behold, before God I lie not.
Philippians 1:8
For God is my witness how ardently I love you with the affection of Christ Jesus.
1 Thessalonians 2:5
For neither nattering words did we at any time use, as you know, nor a pretext for covetousness; God is witness:
1 Timothy 2:7
to give which testimony I have been appointed a preacher and an apostle; (I speak the truth, and lie not;) a teacher of the Gentiles in faithfulness and in truth.
1 Timothy 5:21
I charge you before God, and the Lord Jesus Christ, and the elect angels, that you observe these things without prejudice, and that you do nothing by partiality.

My conscience

Romans 2:15
For when the Gentiles, who have not a law, do, by nature, the things of the law, these who have not a law, are a law to themselves,
Romans 8:16
The Spirit itself testifies with our spirit, that we are the children of God;
2 Corinthians 1:12
For the ground of our rejoicing is this: the testimony of our conscience that we have lived in the world more abundantly, indeed, for you in sincerity and godly purity, not in carnal wisdom, but in the grace of God.
1 Timothy 1:5
(Now the end of the commandment is love out of a pure heart, and out of a good conscience, and out of faith unfeigned:
1 John 3:19
And by this we know that we are of the truth; and we shall have our hearts at rest before him:

General references

Acts 24:16
And I do exercise myself in this, always to have a conscience void of offense toward God and man.