From the early Church Fathers to now.
2 Patristic · 1 Orthodox · 1 Catholic
“By example Paul incites the Romans to a similar effort, indicating that there was a good reason why it seemed good to them. The Gentiles had obtained teachers from the Jews and so … they ought to share their abundance with them.”
“In this, he says, there is nothing new if they wished to make a contribution to the saints: they are their debtors. In what way? Christ comes from the Jews, He came for them; from thence the apostles, the prophets, all good things. But the whole world became a partaker of all this. Therefore those who converted from the Gentiles ought to share with them their bodily goods; exactly so should you as well. He did not say "to admit to participation," but "to minister," presenting them as if they were deacons. Nor did he say "in their bodily goods." For concerning spiritual goods he said that they belong to the Jews, while bodily goods belong not to the Gentiles alone; because the opinion is common to all, and not of the possessors alone.”
“Third, he assigns the reasons, the first of which is good pleasure; hence he says: for it has pleased them: each must do as he has made up his mind, not reluctantly or under compulsion (2 Cor 9:7). The second cause is debt; hence he adds: render therefore to all men their dues (Rom 13:7). He assigns the reason for the debt, saying: for if the gentiles have been made partakers of their spiritual things, i.e., of the Jews, namely, the blessings of divine knowledge and of the promises and of grace, as he says above: to whom belongs the adoption of sons and the glory (Rom 9:4) and: made partaker of the root and of the fatness of the olive tree (Rom 11:17). They were also made partakers of their spiritual blessings, because the Jews had sent them preachers. They ought also in carnal things to minister to them: in dividing by lot, give and take (Sir 14:15); take a psalm, i.e., spiritual things, and give the timbrel, i.e., temporal things (Ps 81:2). From this is taken the argument that expenses are owed not only to those who preach but also to those who send preachers.”
“In this way the believers among the Jews would rejoice at God's providential saving of the Gentiles through their ministry. For these Gentiles, by giving themselves completely to the service of God and not caring at all about the things of this world, offered an example of good behavior to believers. Then too, the apostle wants us to be sympathetic and merciful so that we might feel obliged to give alms and to do good works with a willing heart, because whoever hopes for mercy from God must be merciful, in order to prove that he has some reason for his hope. For if a man is merciful, how much more is God! For this is the payment or reward, that those who receive mercy should be merciful. As the Lord said: "Blessed are the merciful, for God will be merciful to them."”
The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.