My LORD’s BibleApostolic Constitutions, Book II 54
1Wherefore, O bishop, when you are to go to prayer after the lessons, and the psalmody, and the instruction out of the Scriptures, let the deacon stand near you, and with a loud voice say: Let none have any quarrel with another; let none come in hypocrisy; that if there be any controversy found among any of you, they may be affected in conscience, and may pray to God, and be reconciled to their brethren. For if, upon coming into any one's house, we are to say, Peace be to this house, like sons of peace bestowing peace on those who are worthy, as it is written, He came and preached peace to you that are near, and those who are far off, whom the Lord knows to be His, much more is it incumbent on those that enter into the Church of God before all things to pray for the peace of God. But if he prays for it upon others, much more let himself be within the same, as a child of light; for he that has it not within himself is not fit to bestow it upon others. Wherefore, before all things, it is our duty to be at peace in our own minds; for he that does not find any disorder in himself will not quarrel with another, but will be peaceable, friendly, gathering the Lord's people, and a fellow-worker with him, in order to the increasing the number of those that shall be saved in unanimity. For those who contrive enmities, and strifes, and contests, and lawsuits, are wicked, and aliens from God.