5 Wherefore, Venerable Brethren, we call upon you, before all others, to give special care and thought to this cause, which is in every way worthy of your pastoral office and duty. And leaving the rest to your solicitude and diligence, we particularly urge you to foster and promote all the good works instituted in your dioceses for the benefit of the Indians, and to see that other works likely to contribute to this end may be instituted. In the next place you will diligently admonish your flocks on their most sacred duty of helping religious missions to the natives who first inhabited the American soil. Let them know that they ought to help this work especially in two ways, to wit, by their gifts and by their prayers; and that it is not only their religion, but their country also, that asks this of them. Do you, moreover, take care that wheresoever moral instruction is given, in seminaries, in colleges, in convent schools, and more especially in the churches, Christian charity, which holds all men, without distinction of nation or color, as true brethren, shall be continually preached and commended. And this charity must be made manifest not so much by words as by deeds. Moreover, every opportunity must be taken to show what a great dishonor is done to the Christian name by these base deeds, which we are here denouncing.
Source: Lacrimabili Statu (Vatican.va)