The Early Church Fathers on various topics: This was a 3700 hour project which included going through 22896 pages of the 38 volume set called Ante Nicene, Nicene, Post Nicene Fathers. I compiled 255 pages of quotes showing that the Early Church was always and completely Catholic. All of these quotes can be verified and found from the source which is free online.
John Chrysostom Homily 81 on John’s gospel (347-407 ad)
For, "Give alms," it saith, "of such things as ye have, and behold all things are clean unto you." (Luke xi. 41.) "Alms," not covetousness, for that which proceeds from covetousness endures not, though thou give to those who need. For almsgiving is that which is free from all injustice, "this" makes all things clean. This is a thing better even than fasting, or lying on the ground; they may be more painful and laborious, but this more profitable. It enlightens the soul, makes it sleek, beautiful, and vigorous.
John Chrysostom Homily 21 on Acts ch 9 (347-407 ad)
Why, here is a man who has lost all the labor of a whole life: not one day has he lived for himself, but to luxury, to debauchery, to covetousness, to sin, to the devil. Then, say, shall we not bewail this man? shall we not try to snatch him from his perils? For it is, yes, it is possible, if we will, to mitigate his punishment, if we make continual prayers for him, if for him we give alms. However unworthy he may be, God will yield to our importunity. For if Paul showed mercy on one (who had no claims on his mercy), and for the sake of others spared one (whom he would not have spared), much more is it right for us to do this.
John Chrysostom Homily 50 on Matthew’s Gospel ch 5 (347-407 ad)
but let us read all the laws, those in the New and those in the Old Testament, that are set down about almsgiving, and let us be very earnest about this matter. For this cleanses from sin. For "give alms, and all things will be clean unto you." (Tobit)
John Chrysostom Homily 7 on John’s gospel (347-407 ad)
But there is another more prevailing way than this; to bear malice against none of those who have offended against us, to forgive their trespasses to all those who have trespassed against us. Will you learn a third? Hear Daniel, saying, "Redeem thy sins by almsdeeds, and thine iniquities by showing mercy to the poor." (Dan. iv. 27, LXX.) And there is another besides this; constancy in prayer, and persevering attendance on the intercessions made with God. In like manner fasting brings to us some, and that not small comfort and release from sins committed, provided it be attended with kindness to others, and quenches the vehemence of the wrath of God. (1 Tim. ii. 1.) For "water will quench a blazing fire, and by almsdeeds sins are purged away." (Ecclus. iii. 30, LXX.)
John Chrysostom Homily 4 on Philippians (347-407 ad)
And again, "And let our people also learn to maintain good works." (Tit. iii. 14.) And again, "These things are good and profitable unto men." (Tit. iii. 8.) Listen to a certain other one who saith, "Alms do deliver from death" (Tob. xii. 9)
John Chrysostom Homily 21 on Acts ch 9 (347-407 ad)
more sins he has to answer for, the greater need has he of alms, not only for this reason, but because the alms has not the. same virtue now, but far less: for it is not all one to have done it himself, and to have another do it for him; therefore, the virtue being less, let us by quantity make it the greatest. Let us not busy ourselves about monuments, not about memorials. This is the greatest memorial: set widows to stand around him. Tell them his name: bid them all make for him their prayers, their supplications: this will overcome God: though it have not been done by the man himself, yet because of him another is the author of the almsgiving. Even this pertains to the mercy of God: "widows standing around and weeping" know how to rescue, not indeed from the present death, but from that which is to come. Many have profited even by the alms done by others on their behalf: for even if they have not got perfect be not so
Jerome Letter 108 par 16 (347-420 ad)
She constantly had on her lips such phrases as these: "Blessed are the merciful for they shall obtain mercy:" and "water will quench a flaming fire; and alms maketh an atonement for sins;" and "make to yourselves friends of the mammon of unrighteousness that ... they may receive you into everlasting habitations;" and "give alms ... and behold all things are clean unto you;" and Daniel's words to King Nebuchadnezzar in which he admonished him to redeem his sins by almsgiving
Augustine Catechising the uninstructed par 22 (354-430 ad)
If, however, grief has taken possession of us on account of something in which we ourselves have erred or sinned, we should bear in mind not only that a "broken spirit is a sacrifice to God," but also the saying, "Like as water quencheth fire, so alms sin;"
Leo the Great Sermon 9 (395-461 ad)
Let no one therefore, dearly beloved, flatter himself on any merits of a good life, if works of charity be wanting in him, and let him not trust in the purity of his body, if he be not cleansed by the purification of almsgiving. For "almsgiving wipes out sin," kills death, and extinguishes the punishment of perpetual fire. (Tobit)