I have already informed your holiness that if the doctrine of the very holy and venerable bishop, my lord Nestorius, is condemned, I will not communicate with those who do so. If it shall please your holiness to insert this in the letter which is being sent to Antioch so be it. Let there then, I beseech you, be no delay!
Reproduced in full. Translation: Nicene and Post-Nicene Fathers, series 2, vol. 3 (Schaff and Wace, 1892), public domain (Public domain).