The contents of canons have varied over time, books regarded as authoritative by some Christians at some points in history being excluded from the collections of later communities—this was the fate of the many apocryphal Gospels from the first few centuries of the Church (the Gospel of Thomas is a famous example); books long regarded as canonical in one branch of Christianity may be dropped by others on doctrinal grounds (the fate of the deuterocanonical books, canonical in the Roman Catholic and Eastern Orthodox Church but repudiated by the Protestants because they are not included in the Hebrew Bible[44] and supported doctrines to which the Protestant reformers objected such as the intercession of saints, purgatory, prayers for the dead etc.;[45][46] and some books that could have been included, such as the Book of Enoch, quoted as scriptural in Jude 1:14-15, were excluded from the canons of almost all later communities (see Canonicity of the Book of Enoch).