Matthew 5:43
"Ye have heard that it hath been said, Thou shalt love thy neighbour, and hate thine enemy."
Cross References (ranked by relevance)
Leviticus 19:18
29
Thou shalt not avenge, nor bear any grudge against the children of thy people, but thou shalt love thy neighbour as thyself: I am the LORD.
Matthew 19:19
15
Honour thy father and thy mother: and, Thou shalt love thy neighbour as thyself.
Deuteronomy 23:6
11
Thou shalt not seek their peace nor their prosperity all thy days for ever.
James 2:8
If ye fulfil the royal law according to the scripture, Thou shalt love thy neighbour as thyself, ye do well:
Psalm 41:10
But thou, O LORD, be merciful unto me, and raise me up, that I may requite them.