Latin for "Lamb of God." The fraction anthem "Lamb of God" is based on Jn 1:29, and may be used in the celebration of the eucharist at the breaking of the bread (BCP, pp. 337, 407). The invocation is repeated three times, with the first two invocations followed by the phrase "Have mercy upon us." The third invocation is concluded by the phrase "Grant us thy peace." The text of the Agnus Dei is also used in the Great Litany (BCP, p. 152).