The apostles ordained, that “we should not judge any one in respect to meat or drink, or in regard to a feast day, or the new moons, or the sabbaths.” Whence then these contentions? Whence these schisms? We keep the feast, but in the leaven of malice and wickedness, cutting in pieces the Church of God; and we preserve what belongs to its exterior, that we may cast away these better things, faith and love. We have heard from the prophetic words that these feasts and fasts are displeasing to the Lord.
Source: Fragments from the Lost Writings of Irenaeus (New Advent)