2 Corinthians 4:2
Instead, we have renounced [the practice of] secret, disgraceful behavior. We do not practice deception, nor resort to distorting God's message. But, by making known the truth [i.e., the true message], we commend ourselves to everyone's conscience in the presence of God.
2 Corinthians 11:3
But I am afraid that somehow, just as the snake tricked Eve by his cunning, your minds might [also] be led astray from your sincere and pure devotion to Christ.
2 Corinthians 11:13-15
For such men are false apostles; they are deceitful workers, who disguise themselves as [true] apostles of Christ.
2 Corinthians 12:16-18
So, let it be [said] that I did not become a burden to you. But being a clever person, [some are saying] that I took you in by trickery. [Note: Paul is saying that even though he took no financial support from the church, they are accusing him of taking financial advantage of them through other people].
1 Thessalonians 2:3
For our appeal [to you was] not based on error, or impure [motives], or deception.