Westminster Larger Catechism

Q. 176. Wherein do the sacraments of baptism and the Lord’s Supper agree?

A. The sacraments of baptism and the Lord’s Supper agree, in that the author of both is God; the spiritual part of both is Christ and his benefits; both are seals of the same covenant, are to be dispensed by ministers of the gospel, and by none other; and to be continued in the church of Christ until his second coming.