Romans 9:1

I say the truth in Christ, I lie not, my conscience bearing witness with me in the Holy Spirit,

Galatians 1:20

Now what I write to you, behold, before God, I do not lie.

1 Timothy 2:7

to which I have been appointed a herald and apostle, (I speak the truth, I do not lie,) a teacher of the nations in faith and truth.

Romans 1:9

For God is my witness, whom I serve in my spirit in the glad tidings of his Son, how unceasingly I make mention of you,

Romans 8:16

The Spirit itself bears witness with our spirit, that we are children of God.

2 Corinthians 11:10

The truth of Christ is in me that this boasting shall not be stopped as to me in the regions of Achaia.

2 Corinthians 12:19

Ye have long been supposing that we excuse ourselves to you: we speak before God in Christ; and all things, beloved, for your building up.

Romans 2:15

who shew the work of the law written in their hearts, their conscience also bearing witness, and their thoughts accusing or else excusing themselves between themselves;)

2 Corinthians 1:12

For our boasting is this, the testimony of our conscience, that in simplicity and sincerity before God, (not in fleshly wisdom but in God's grace,) we have had our conversation in the world, and more abundantly towards you.

2 Corinthians 1:23

But I call God to witness upon my soul that to spare you I have not yet come to Corinth.

2 Corinthians 11:31

The God and Father of the Lord Jesus knows he who is blessed for ever that I do not lie.

Philippians 1:8

For God is my witness how I long after you all in the bowels of Christ Jesus.

1 Thessalonians 2:5

For we have not at any time been among you with flattering discourse, even as ye know, nor with a pretext for covetousness, God is witness;

1 Timothy 1:5

But the end of what is enjoined is love out of a pure heart and a good conscience and unfeigned faith;

1 Timothy 5:21

I testify before God and Christ Jesus and the elect angels, that thou keep these things without prejudice, doing nothing by favour.

1 John 3:19-21

And hereby we shall know that we are of the truth, and shall persuade our hearts before him --

Treasury of Scripture Knowledge

Bible References

I say

Romans 1:9
For God is my witness, whom I serve in my spirit in the glad tidings of his Son, how unceasingly I make mention of you,
2 Corinthians 1:23
But I call God to witness upon my soul that to spare you I have not yet come to Corinth.
2 Corinthians 11:31
The God and Father of the Lord Jesus knows he who is blessed for ever that I do not lie.
2 Corinthians 12:19
Ye have long been supposing that we excuse ourselves to you: we speak before God in Christ; and all things, beloved, for your building up.
Galatians 1:20
Now what I write to you, behold, before God, I do not lie.
Philippians 1:8
For God is my witness how I long after you all in the bowels of Christ Jesus.
1 Thessalonians 2:5
For we have not at any time been among you with flattering discourse, even as ye know, nor with a pretext for covetousness, God is witness;
1 Timothy 2:7
to which I have been appointed a herald and apostle, (I speak the truth, I do not lie,) a teacher of the nations in faith and truth.
1 Timothy 5:21
I testify before God and Christ Jesus and the elect angels, that thou keep these things without prejudice, doing nothing by favour.

My conscience

Romans 2:15
who shew the work of the law written in their hearts, their conscience also bearing witness, and their thoughts accusing or else excusing themselves between themselves;)
Romans 8:16
The Spirit itself bears witness with our spirit, that we are children of God.
2 Corinthians 1:12
For our boasting is this, the testimony of our conscience, that in simplicity and sincerity before God, (not in fleshly wisdom but in God's grace,) we have had our conversation in the world, and more abundantly towards you.
1 Timothy 1:5
But the end of what is enjoined is love out of a pure heart and a good conscience and unfeigned faith;
1 John 3:19
And hereby we shall know that we are of the truth, and shall persuade our hearts before him --

General references

Lamentations 3:48
Mine eye runneth down with streams of water for the ruin of the daughter of my people.
Acts 24:16
For this cause I also exercise myself to have in everything a conscience without offence towards God and men.