Matthew 5:44 - "But I say to you, Love your enemies and pray for those who persecute you..."
Luke 6:35 - "But love your enemies, and do good, and lend, expecting nothing in return, and your reward will be great, and you will be sons of the Most High, for he is kind to the ungrateful and the evil."
Romans 12:14 - "Bless those who persecute you; bless and do not curse them."
1Peter 3:9 - "Do not repay evil for evil or reviling for reviling, but on the contrary, bless, for to this you were called, that you may obtain a blessing."
James 3:10 - "From the same mouth come blessing and cursing. My brothers, these things ought not to be so."