Said by the celebrant during the Liturgy of the Eucharist at the Fraction, just after the Peace and before the Agnes Dei.
"Alleluia"s are omitted during Lent.
As the Priest takes the Host and breaks it, he sings or says:
(Alleluia) Christ our Passover is sacrificed for us;
People: Therefore let us keep the feast. (Alleluia)
The Priest places a particle of the Host in the Chalice, making the Sign of the Cross with it, saying quietly:
May this mingling and consecration of the Body and Blood of our Lord Jesus Christ bring eternal life to us who receive it.
The Priest genuflects and then the Agnus Dei is sung or said.