Library Pseudo-Clement Clementine Homilies
Homily 12, Chapter 7: Not to Be Ministered Unto, But to Minister.
But I, when I heard this, fell a-trembling and weeping, that such a word should be spoken by a man to whom all the men of this generation are inferior in point of knowledge and piety. But he, seeing me weeping, asked the cause of my tears. Then I said, In what have I sinned so that you have spoken to me such a word?
Then Peter answered, If it were wrong of me to speak of being your servant, you were first in fault in asking to be mine.
Then I said, The cases are not parallel; for to do this indeed becomes me well; but it is terrible for you, the herald of God, and who savest our souls, to do this to me.
Then Peter answered, I should agree with you, but that our Lord, who came for the salvation of all the world, being alone noble above all, submitted to the condition of a servant, that He might persuade us not to be ashamed to perform the ministrations of servants to our brethren, however well-born we may be.
Then I said, If I think to overcome you in argument, I am foolish. However, I thank the providence of God, that I have been thought worthy to have you instead of parents.
English translation in Ante-Nicene Fathers, Vol. VIII (eds. Alexander Roberts and James Donaldson; Buffalo: Christian Literature Publishing Co., 1886). Public domain. Digital text via New Advent Church Fathers.