II Corinthians 11:7, 9

Did I commit sin in humbling myself that you might be exalted, because I preached the gospel of God to you free of charge?

And when I was present with you, and in need, I was a burden to no one, for what I lacked the brethren who came from Macedonia supplied. And in everything I kept myself from being burdensome to you, and so I will keep myself.