Nicene and Post-Nicene Fathers, Vol. IV:
Writings in Connection with the Donatist Controversy.: Chapter 76

Chapter 76.—167.  Petilianus said:  "But to us the Lord Christ, in opposition to your deadly commands, commanded simple patience and harmlessness.  For what says He?  ‘A new commandment I give unto you, That ye love one another; as I have loved you, that ye also love one another.’  And again, ‘By this shall all men know that ye are my disciples, if ye have love one to another.’"  2180

168.  Augustin answered:  If you did not transfer these words, so widely differing from your character, to the surface of your talk, how could you be covering yourselves with sheep’s clothing?

Footnotes

John 13:34, 35.