Baptism is the sacrament instituted by our Lord Jesus Christ when after His resurrection He commanded His apostles to go and teach all nations,
...baptizing them in the name of the father and of the Son and of the Holy Ghost - St. Mathew 28:19
Unless a man be born again of water and the Holy Ghost, he cannot enter into the kingdom of God - St. John 3:5Parents must not therefore, by delaying baptism, expose a newly born child to the danger of dying without having received this sacrament and so of missing heaven. Further, Canon 770 of the Canon Law of the Church says that a child should be baptized quam primum, so soon as possible.
1322 The holy Eucharist completes Christian initiation. Those who have been raised to the dignity of the royal priesthood by Baptism and configured more deeply to Christ by Confirmation participate with the whole community in the Lord's own sacrifice by means of the Eucharist.
1323 "At the Last Supper, on the night he was betrayed, our Savior instituted the Eucharistic sacrifice of his Body and Blood. This he did in order to perpetuate the sacrifice of the cross throughout the ages until he should come again, and so to entrust to his beloved Spouse, the Church, a memorial of his death and resurrection: a sacrament of love, a sign of unity, a bond of charity, a Paschal banquet 'in which Christ is consumed, the mind is filled with grace, and a pledge of future glory is given to us.'"
1422 "Those who approach the sacrament of Penance obtain pardon from God's mercy for the offense committed against him, and are, at the same time, reconciled with the Church which they have wounded by their sins and which by charity, by example, and by prayer labors for their conversion.
All aforementioned text is taken from Vatican Website Catechism1499 "By the sacred anointing of the sick and the prayer of the priests the whole Church commends those who are ill to the suffering and glorified Lord, that he may raise them up and save them. and indeed she exhorts them to contribute to the good of the People of God by freely uniting themselves to the Passion and death of Christ."
All aforementioned text is taken from Vatican Website CatechismMarriage is a sacrament instituted by Jesus Christ in order to unite, by indissoluble bond, two souls whom God has made for each other, and who will love and be devoted to each other " as Christ loved the Church and delivered himself up for it ", (Epistle for the Nupital Mass)." God has, in fact, consecrated the union of spouses by a mystery so excellent that the nupital bond is the figure of the sacred union of Christ with His Church." (The Nupital Blessing.)
The Holy Eucharist in which Christ makes ever more and more perfect His union with our souls is a sacrifice and a sacrament ; and the same is true in marriage, in which a man and a woman unite their lives for ever.1536 Holy Orders is the sacrament through which the mission entrusted by Christ to his apostles continues to be exercised in the Church until the end of time: thus it is the sacrament of apostolic ministry. It includes three degrees: episcopate, presbyterate, and diaconate.
(On the institution and mission of the apostolic ministry by Christ, see above, no. 874 ff. Here only the sacramental means by which this ministry is handed on will be treated.)