VI. The Necessity of Baptism

From The Catechism of the Catholic Church

1258
The Church has always held the firm conviction that those who suffer death for
the sake of the faith without having received Baptism are baptized by their
death for and with Christ. This Baptism of blood, like the desire for Baptism,
brings about the fruits of Baptism without being a sacrament.

PART TWO: THE CELEBRATION OF THE CHRISTIAN MYSTERY

SECTION TWO THE SEVEN SACRAMENTS OF THE CHURCH
- CHAPTER ONE THE SACRAMENTS OF CHRISTIAN INITIATION
  - Article 1 THE SACRAMENT OF BAPTISM
    - VI. The Necessity of Baptism

From The Catechism of the Catholic Church – rosary.team