CCC 1217

In the liturgy of the Easter Vigil, during the blessing of the baptismal water, the Church solemnly commemorates the great events in salvation history that already prefigured the mystery of Baptism:

Father, you give us grace through sacramental signs which tell us of the wonders of your unseen power. In Baptism we use your gift of water, which you have made a rich symbol of the grace you give us in this sacrament.¹¹ Roman Missal, Easter Vigil 42: Blessing of Water.