IV. The Liturgical Celebration of the Eucharist

1350
The presentation of the offerings (the Offertory). Then, sometimes in procession,
the bread and wine are brought to the altar; they will be offered by the priest
in the name of Christ in the Eucharistic sacrifice in which they will become
his body and blood. It is the very action of Christ at the Last Supper –
“taking the bread and a cup.” “The Church alone offers this pure
oblation to the Creator, when she offers what comes forth from his creation
with thanksgiving.”¹⁷⁵ The presentation of the offerings at the
altar takes up the gesture of Melchizedek and commits the Creator’s gifts into
the hands of Christ who, in his sacrifice, brings to perfection all human
attempts to offer sacrifices.

From The Catechism of the Catholic Church – rosary.team

Original Link: https://www.vatican.va/archive/ENG0015/__P40.HTM