The Didache

But every true prophet that willeth to abide among you is worthy of his support. So also a true teacher is himself worthy, as the workman, of his support. Every first-fruit, therefore, of the products of wine-press and threshing-floor, of oxen and of sheep, thou shalt take and give to the prophets, for they are your high priests. But if ye have not a prophet, give it to the poor. If thou makest a batch of dough, take the first-fruit and give according to the commandment. So also when thou openest a jar of wine or of oil, take the first-fruit and give it to the prophets; and of money and clothing and every possession, take the first-fruit, as it may seem good to thee, and give according to the commandment.