Compare Jesus Ben Sira, Sirach 7:31 and Didache 13:3

"... The ministry of the itinerant charismatic is to be received with the same eagerness and seriousness as would be rendered to Christ himself. Such a status is reflected in the hospitality to be offered to itinerant prophets. They are to have priority—the first pick of the harvest—even before the poor (Didache 13:4; Mark 14:7)—also money, clothing and everything you own (Didache 13:7). In other words, such ambassadors cannot be honored enough for the ministry they undertake in Christ’s name, reflecting the dominical teaching that laborers deserve their food (Matthew 10:9-10). Furthermore, such treatment reflects that rendered to the priesthood of the Old Testament, who are qualified to consume what the people have first given to God (Deuteronomy 18:1-8; Nehemiah 10:37-39; Sirach 7:31-32). The Didachist makes this overtly clear: they are your high priests (Didache 13:3). Clearly, they were an integral part of the church’s life in the earliest days, which was encouraged to both welcome them and give them every support for the furtherance of their mission. But the evidence is that this very welcome and generous openness contributed, in more than a few cases, to local difficulties. One was the nature of their teaching. Local communities are expected to understand the Christian kerygma they received well enough to be able to distinguish between true and false prophets: exercise your critical judgment (Didache 12:1; 1 John 4:1). The true itinerant will serve to fortify the faith of the church (Didache 11:2), his lifestyle will accord to that of Jesus himself (Didache 11:8); and he will not be hypocritical, teaching what he, himself, does not practice (Didache 11:10, compare Matthew 23:2-3). If he proves be so, the false one should be avoided (Didache 12:5; Romans 16:17) ..."