IV. The Liturgical Celebration of the Eucharist

From The Catechism of the Catholic Church

1351
From the very beginning Christians have brought, along with the bread and wine
for the Eucharist, gifts to share with those in need. This custom of the
collection, ever appropriate, is inspired by the example of Christ who became
poor to make us rich:¹⁷⁶

PART TWO: THE CELEBRATION OF THE CHRISTIAN MYSTERY

SECTION TWO THE SEVEN SACRAMENTS OF THE CHURCH
- CHAPTER ONE THE SACRAMENTS OF CHRISTIAN INITIATION
  - Article 3 THE SACRAMENT OF THE EUCHARIST
    - IV. The Liturgical Celebration of the Eucharist

From The Catechism of the Catholic Church – rosary.team