Augustine of Hippo — as excerpted in the Catena Aurea on John 13:6-11

“Or thus: We must not suppose that Peter was afraid and refused, when the others had willingly and gladly submitted to the washing. Our Lord did not go through the others first, and to the first of the Apostles afterwards; (for who is ignorant that the most blessed Peter was the first of all the Apostles?) but began with him: and Peter being the first to whom He came, was afraid; as indeed any of the others would have been.”