Book of Common Prayer (page 339)

After Communion, the Celebrant says

Let us pray.

The People may join in saying this prayer

Almighty and everliving God, we most heartily thank thee
for that thou dost feed us, in these holy mysteries, with the
spiritual food of the most precious Body and Blood of thy
Son our Savior Jesus Christ; and dost assure us thereby of
thy favor and goodness towards us; and that we are very
members incorporate in the mystical body of thy Son, the
blessed company of all faithful people; and are also heirs,
through hope, of thy everlasting kingdom. And we humbly
beseech thee, O heavenly Father, so to assist us with thy
grace, that we may continue in that holy fellowship, and do
all such good works as thou hast prepared for us to walk in;
through Jesus Christ our Lord, to whom with thee and the
Holy Ghost, be all honor and glory, world without end.
Amen.

The Bishop when present, or the Priest, gives the blessing

The peace of God, which passeth all understanding, keep
your hearts and minds in the knowledge and love of God,
and of his Son Jesus Christ our Lord; and the blessing of
God Almighty, the Father, the Son, and the Holy Ghost, be
amongst you, and remain with you always. Amen.

or this

The blessing of God Almighty, the Father, the Son, and the
Holy Spirit, be upon you and remain with you for ever. Amen.

The Deacon, or the Celebrant, may dismiss the people with these words

Let us go forth in the name of Christ.

People Thanks be to God.

or the following