2 Corinthians 11:7-10, 12

Have I committed a sin by degrading myself to dignify you? Was I wrong to preach the gospel of God to you free of charge? I received ample financial support from other churches just so that I could freely serve you. Remember, when I was with you I didn’t bother anyone when I needed money, for my needs were always supplied by my Macedonian friends. So I was careful, and will continue to be careful, that I never become a burden to you in any way. As the reality of Christ lives within me, my glad boast of offering the gospel free of charge will not be silenced throughout the region of Achaia.

But in order to eliminate the opportunity for those “super-apostles” to boast that their ministry is on the same level as ours I will continue this practice.