{Even so did the Lord ordain} (hout(9373) kai ho Kurios
dietaxen). Just as God gave orders about the priests in the
temple, so did the Lord Jesus give orders for those who preach
the gospel to live out of the gospel (ek tou euaggeliou z(8869)n).
Evidently Paul was familiar with the words of Jesus in  Mt 10:10  Lu 10:7f.  either in oral or written form. He has made his
argument for the minister's salary complete for all time.