1 Corinthians 9:2

“He who has received His witness has set his seal to this, that God is true.

to take the place of this ministry and apostleship from which Judas turned aside to go to his own place.”

But if one is inclined to be contentious, we have no other practice, nor have the churches of God.

You are our letter, having been written in our hearts, known and read by all men,

nor seeking glory from men, either from you or from others, even though as apostles of Christ we could have been a burden to you.