Here is the link to Article XXII: https://bookofconcord.org/augsburg-confession/of-both-kinds-in-the-sacrament/
In medieval times, when the Lord’s Supper was celebrated, only the clergy were allowed to drink from the cup. The laity were given only the consecrated bread to eat. The primary justifications for this practice were:
- That if the laity received the cup, there is a danger of spilling the blood of Christ.
- That all of Christ is available in both the bread and the wine, and therefore it is unnecessary for laypersons to receive both elements.
The reformers recognized that this withholding of the cup was a recent innovation, and that from the early days of the church, Christian laypersons were allowed to receive both elements of the sacrament. Therefore, they restored the Biblical practice of distributing communion in both kinds.
The Roman Church maintained its stance until Vatican II, where it was determined that bishops may grant permission for laypersons to drink from the cup.
Christ Alone Lutheran Brethren Church 