Ancient Paedocommunionism was conceived in Paganism. Only later did it infiltrate into the Early-Medieval Church. It did so, through the magical syncretism between the Eastern Rites and Eastern Paganism, and also by way of Post-Christian Judaism. Yet, as such, it is totally averse and foreign to God’s infallible Word.
As Rev. Professor Dr. John Calvin remarks in his Institutes of the Christian Religion (IV:15:30): “The Supper is intended for those of riper years…. He does not admit all to partake of the Supper – but confines it to those who are fit to discern the body and blood of the Lord…. ‘He who eats and drinks unworthily, eats and drinks damnation to himself, not discerning the Lord’s body’ [First Corinthians 11:29]…. Why should we offer poison – to our young children? The Passover for which the Supper is substituted…was duly eaten only by those who were of age sufficient to ask the meaning of it. Exodus 12:26.”