"You have heard that it was said, ‘Love your neighbor and hate your enemy.’ But I tell you, Love your enemies and pray for those who persecute you, that you may be sons of your Father in heaven...Be perfect, therefore, as your heavenly Father is perfect." (Matthew 5:43-44, 48)
Many critics have claimed that Jesus could not have mentioned the words referring to the hatred of enemies, as no such injunction is found in the Old Testament or in the Jewish literature.
[Donna: It is obvious that Jesus wasn't quoting a scripture that referred to hatred of one's enemies because he said, "You have heard..." Whenever he quoted a scripture, he always said, "It is written" or "Is it not written?]
The Manual of Discipline from the Dead Sea Scrolls, however, advises the Qumran community members to "love all that God has chosen and hate all that He has rejected" , and also to "hate all the children of darkness". It is thought nowadays that Jesus was referring to the Essenes, who were his contemporaries.
Love for one’s enemies is, however, contained in the OT ordinances. In Exodus 23:4-5 we read: "If you come across your enemy’s ox or donkey wandering off, be sure to take it back to him. If you see the donkey of someone who hates you fallen down under its load, do not leave it there; be sure you help him with it."
Santala, Risto. 1992. The Messiah in the New Testament. Jerusalem: Keren Avah Meshihit., pgs 172-173