A schismatic Christian religion in northern Africa from the 4th to the 7th century; held that only those who led a blameless life belonged in the church or could administer the sacraments WordNet 3.0 & Open English WordNet

Donatism was a Christian sect leading to a schism in the Church, in the region of the Church of Carthage, from the fourth to the sixth centuries. Wikipedia

Christian sect Wikidata

An early Christian belief which maintained that apostate priests were incapable of administering the sacraments, as opposed to the orthodox view that any sacrament administered by a properly ordained priest or bishop is valid, regardless of how sinful he is or if he has converted to another religion. Wiktionary

Christian belief. Wiktionary (translation)