Acts 24:16
So, for this reason I make every effort to have a clear conscience before God and men at all times.
2 Corinthians 1:12
For this is what we boast of: Our conscience testifies that we have conducted ourselves in the world, and especially toward you, in holiness and godly sincerity, not with human wisdom, but with the favor of God.
2 Corinthians 11:31
The God and Father of the Lord Jesus, who should be praised forever, knows that I am not lying.
1 Thessalonians 2:10
You can testify, [just] as God can, how holy, righteous and blameless our conduct was toward you believers.
1 John 3:17-22
Now whoever has [a sufficient amount of] life's possessions and [then] observes one of his [Christian] brothers who does not have enough to get by on, but does not feel sorry for him [i.e., enough to help him out], surely a love for God does not continue to live in that person's heart.