Letters of Ignatius 5

1So then it is fitting for you to run in harmony with the mind of the bishop, as indeed you do. For your honorable council of elders, which is worthy of God, is attuned to the bishop like strings to a lyre. Therefore Jesus Christ is sung in your unity and harmonious love.

2Each and every one of you should form yourselves into a chorus, so that, being harmonious in unity and taking the key note of God, you may sing in unison with one voice through Jesus Christ to the Father. Then he may both hear you and acknowledge by your good deeds that you are members of his Son. It is therefore beneficial for you to be in blameless unity, so that you may always share in God.