1Tim 5:18

“He alleges the Law, he alleges the words of Christ, both agreeing herein. For the Law says, "Thou shall not muzzle the ox that treadeth out the corn." See how he would have the teacher labor! For there is not, indeed there is not, any other labor such as his. But this is from the Law. But how does he quote from Christ? "The laborer is worthy of his reward." Let us not then look only to the reward, but to the terms of the commandment. "The laborer," he says, "is worthy of his reward." So that if any one lives in sloth and luxury, he is unworthy of it. Unless he is as the ox treading out the corn, and bearing the yoke, in spite of heat and thorns, and ceases not till he has carried the corn into the granary, he is not worthy.”

“And it should be noted what is added: "The laborer is worthy of his hire," because the very food for sustenance is already part of the wages of the work, so that here the reward from the labor of preaching may begin, which is perfected there in the vision of truth. In this matter it should be considered that two rewards are owed to our one work: one on the way, the other in the homeland; one which sustains us in labor, another which recompenses us in the resurrection. Therefore the reward which is received in the present ought to accomplish this in us: that we may strive more vigorously toward the subsequent reward. Therefore every preacher should not preach in order to receive a reward in this time, but should receive a reward in order to continue preaching. For whoever preaches in order to receive here a reward of either praise or gift, without doubt deprives himself of the eternal reward.”

“The apostle brings forward testimonies—one from the law, and another testimony of Christ. In both, observe what labor is required of the teacher. Threshing is the most arduous labor: and the teacher likewise must be prepared for every kind of toil, hardship, and grief. By the expression "the laborer," the apostle shows that one must not seek comfort and rest. "The laborer is worthy of his reward," or food. By these words the apostle points to prosperity: for if the laborer is worthy of his reward, then how much more of food. But the one who does not labor is unworthy.”

“Then when he says, for the Scripture says, he proves his statement with two authorities: one is used in the mystical sense and the other in the literal sense, at the laborer is worthy of his reward. He says, therefore, for the Scripture says, namely, Deuteronomy: you shall not muzzle the ox that treads out the corn (Deut 25:4). In 1 Corinthians the Apostle shows that this passage is to be understood for teachers, for does God take care for oxen? (1 Cor 9:8). Not that they are not included under divine providence, but that he is not concerned how men treat them, since they can use them as they will. Consequently, that law is not concerned with oxen, but is a law presented under a figure. As if to say: do not prevent a man who labors in the office of preaching and ruling from living off his office. By oxen are understood teachers: where there are no oxen, the crib is empty; but where is much corn, there the strength of the ox is manifest (Prov 14:4); by corn is understood the faithful: the harvest indeed is great (Matt 9:37). Therefore, teachers and preachers are not to be prevented from having their honorarium. The other authority is in Matthew: the laborer is worthy of his food (Matt 10:10); but it is better to say that it is from the Old Testament, although it is not stated in those words: for the Apostle never quotes the Gospel without explicitly saying so. But this authority is taken from Leviticus: the wages of him who has been hired by you shall not abide with you until the morning (Lev 19:13). But are those honoraria considered to be wages? Augustine in a Gloss says that they are not. For the Gospel is not something that can be bought and sold in the sense that one preaches for a price. For sometimes that which is given to a person as a final reward is called a wage; but God forbid that a preacher's wages be that sort of honorarium: but sometimes a wage refers to that which a person deserves for his labor; and this is taking wage in a broad sense. Accordingly, Augustine says: let them accept.”