Would that not be implicit in the verses relating to the golden rule?

Matthew 22:37-39 KJVS
Jesus said unto him, Thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy mind. [38] This is the first and great commandment. [39] And the second is like unto it, Thou shalt love thy neighbour as thyself.

Romans 13:10 KJVS
Love worketh NO ILL to his neighbour: therefore love is the fulfilling of the law.

Galatians 5:13-14 KJVS
For, brethren, ye have been called unto liberty; only use not liberty for an occasion to the flesh, but by love serve one another. [14] For all the law is fulfilled in one word, even in this; Thou shalt love thy neighbour as thyself.

There is also what I believe to be a related underlying principle in this verse. Note how marriage is the ideal in this instance

Matthew 19:8 KJVS
He saith unto them, Moses because of the hardness of your hearts suffered you to put away your wives: but from the beginning it was not so.