Leviticus 19.18
Septuagint

kai ouk ekdikatai sou h ceir:  kai ou mhnieiV toiV tou laou sou: 
kai agaphseiV ton plhsion sou wV seauton:
egw eimi kurioV
 

New Testament - Matthew 5.43

hkousate oti erreqh: 
agaphseiV ton plhsion sou kai mishseiV ton ecqron sou

Matthew 19.19

tima ton patera kai thn mhtera, kai agaphseiV ton plhsion sou wV seauton

Matthew 22.39

deutera de omoia auth: 
agaphsseiV ton plhsion sou wV seauton

Mark 12.31

deutera auth: 
agaphseiV ton plhsion sou wV seauton

Mark 12.33

to agapan ton plhsion wV eauton

Luke 10.27

o de apokriqeiV eipen: agaphseiV kurion ton qeon sou ex olhV thV kardiaV sou kai en olh yuch sou kai en olh th iscui sou kai en olh th dianoia sou, kai 
ton plhsion sou wV seauton

Romans 13.9

agaphseiV ton plhsion sou wV seauton

Galatians 5.14

agaphseiV ton plhsion sou wV seauton

James 2.8

agaphseiV ton plhsion sou wV seauton

Septuagint

And thy hand shall not avenge thee; and thou shalt not be angry with the children of thy people; and thou shalt love thy neighbor as thyself; I am the Lord
 

New Testament

Matthew 5.43:  Ye have heard that it was said, Thou shalt love thy neighbor, and hate thine enemy

Matthew 19.19:  Honor thy father and thy mother; and, Thou shalt love thy neighbor as thyself

Matthew 22.39:  And a second like unto it is this, Thou shalt love thy neighbor as thyself

Mark 12.31:  The second is this, Thou shalt love thy neighbor as thyself

Mark 12.33:  to love his neighbor as himself

Luke 10.27:  And he answering said, Thou shalt love the Lord thy God will all thy heart, and with all thy soul, and with all thy strength, and with all thy mind; and thy neighbor as thyself

Romans 13.9Thou shalt love thy neighbor as thyself

Galatians 5.14:  For the whole law is fulfilled in one word, even in this:  Thou shalt love thy neighbor as thyself

James 2.8:  Howbeit if ye fulfill the royal law, according to the scripture, Thou shalt love thy neighbor as thyself, ye do well 

Masoretic Text

Thou shalt not take vengeance, nor bear any grudge against the children of thy people; but thou shalt love thy neighbor as thyself:  I am Jehovah

Comments:  The NT, the LXX and the MT agree.