Council of Trent (16th century): Decree on Justification, Session VI, Chapter 4: "And this translation, since the promulgation of the Gospel, cannot be effected, without the laver of regeneration, or the desire thereof, as it is written; unless a man be born again of water and the Holy Ghost, he cannot enter into the Kingdom of God."
Session VII, Concerning the Sacraments in General, Canon 4 (Denz 847): "If anyone shall say that the sacraments of the New Law are not necessary for salvation, but are superfluous, and that, although all are not necessary for every individual, without them or without the desire of them, through faith alone men obtain from God the grace of justification; let him be anathema."