1 Corinthians 16

The Collection of the Saints

Now concerning the collection of the saints: as I directed the churches of Galatia, so you also are to do. – 1 Corinthians 16:1

The collection of the saints is equivalent to a fund that supports those in ministry. Paul and a few of his companions don't actually take from this fund but work to support themselves (1 Corinthians 4:12).

On the very first day of every week, each of you is to put something aside and store it up, as he may prosper, so that there will be no collecting when I come. – 1 Corinthians 16:2

To keep things efficient, Paul instructs the church of Corinth to collect every week so that there won't be the need to collect when Paul arrives. That way, it's already ready.

And when I arrive, I will send those whom you accredit by letter to carry your gift to Jerusalem. If it seems advisable that I should go also, they will accompany me. – 1 Corinthians 16:3-4

And to assure the church of Corinth that Paul isn't a scammer, he lets them choose trusted people to deliver the collection of the stains, and takes himself out of the picture.