I Thessalonians 2:3-6

For our exhortation did not come from error or uncleanness, nor was it in deceit. But as we have been approved by God to be entrusted with the gospel, even so we speak, not as pleasing men, but God who tests our hearts. For neither at any time did we use flattering words, as you know, nor a cloak for covetousness—God is witness. Nor did we seek glory from men, either from you or from others, when we might have made demands as apostles of Christ.