See
newadvent.org/cathen/09707a.htm
which states
The Council of Florence, in the Decree for the Armenians, had already declared: “The seventh sacrament is matrimony, which is a figure of the union of Christ, and the Church, according to the words of the Apostle: This is a great sacrament, but I speak in Christ and in the Church.’”
And Innocent IV, in the profession of faith prescribed for the Waldensians (18 December, 1208), includes matrimony among the sacraments (Denzinger-Bannwart, “Enchiridion”, n. 424).
The acceptance of the sacraments administered in the Church had been prescribed in general in the following words: “And we by no means reject the sacraments which are administered in it (the Roman Catholic Church), with the co-operation of the inestimable and invisible power of the Holy Ghost, even though they be administered by a sinful priest, provided the Church recognizes him”, the formula then takes up each sacrament in particular, touching especially on those points which the Waldensians had denied: “Therefore we approve of baptism of children . . . confirmation administered by the bishop . . . the sacrifice of the Eucharist. . . . We believe that pardon is granted by God to penitent sinners . . . we hold in honour the anointing of the sick with consecrated oil . . . we do not deny that carnal marriages are to be contracted, according to the words of the Apostle.”