The following is from that book I praised a few days ago, The Chief Divine Service. This particular prayer fell between the Sanctus and the chanting of Our Father and then the Verba in the Braunschweig-Wolfenbüttel Church Order of 1657. It rather supports something I have long suspected: that the Admonitions were in themselves “prayer forms” for they were spoken in the awareness of the presence of God. But this particular form actually makes this explicit. It’s on page 245, 246. There are distinct echoes here of the classic anaphorae of antiquity (including the Roman Canon):

My dearly beloved in God, forasmuch as we purpose to keep the Supper of our Lord Jesus Christ, in which His body is given to us for food and His blood for drink, that in so doing we may remember His death and heartily thank Him, let us therefore call upon God the Father in the name of Jesus Christ, praying from our inmost heart as follows:

(Here let the priest pray with a clear voice, intelligibly, and slowly, so that the whole congregation may hear it and every man say it with him in his heart.)

Lord God, heavenly Father, we heartily thank You that, because of our sin and for our salvation, You have caused Your only beloved Son, our Lord and Savior, Jesus Christ, to be made man, to suffer so many unspeakable agonies, and to die a bitter death upon the cross; who, lest we should forget what He endured for us, also commanded us to keep this present remembrance of His agony and death in the Holy Supper, in which He, out of His unspeakable love, truly gives us in and with this bread and wine the very body which died for us upon the cross and the very blood which was shed for us upon the cross, to eat and to drink, that we may not doubt, but the more confidently believe that His death and the shedding of His blood upon the cross is our certain salvation.

By the same Your dear Son, the only Mediator between You, the righteous God, and us poor sinners, and by His bloody merit, we beseech You, O heavenly Father, to have mercy upon us all. Look upon the face of this our faithful Mediator, Your beloved Son, Jesus Christ, who intercedes for us and is our Advocate at Your right hand. Regard His holy, innocent blood- shed, suffering, and death, which He endured for our trespasses with all patience, out of unspeakable love for us lost men. Forgive us our sins, and give us Your Holy Spirit, that renouncing ungodliness and worldly lusts, we may live in this world moderately toward ourselves, justly toward our neighbors, and in constant, childlike fear toward You, O God, our heavenly Father, as we await the blessed hope and appearing of the glory of our mighty God, Your Son, our Savior Jesus Christ. Let each of us take up his cross, follow Your dear Son, and love one another even as Your dear Son has loved us. For this Holy Sacrament is one bread, and we are all one body, since we partake of one bread and all drink of one cup. Grant to us also, and to all believing Christians, as is profitable and good for us, that we may conduct and conclude this life in fear of You, and obtain eternal salvation. Whereupon let us say from our heart, Amen.

(Note from the author: An Amen subsequently sung by the congregation would not only best express this collective Amen, but also form a transition to the chanting of the Our Father, etc.)

I think I’d give that prayer a quite hearty Amen, sung or not! Here’s the link again, if you forgot to order your copy: The Chief Divine Service.