Matthew 5:44
But I tell you, love your enemies and pray for those who persecute you,
Luke 10:33-36
But [then] a certain Samaritan [Note: This was a person despised by the Jews and regarded by them as a 'half-breed'], as he traveled along, came to where the [injured] man was [lying], and upon seeing him [lying there], felt deep pity [for him].
Romans 12:20-21
But [Prov. 25:21-25 says], "Feed your enemy if he is hungry; give him something to drink if he is thirsty. For when you do this, it will be [like] heaping burning coals on his head." [i.e., it can cause him burning shame that can lead to his repentance and ultimate forgiveness].