Leviticus 20:20-21 " And if a man shall lie with his uncle's
wife, he hath uncovered his uncle's nakedness [The term nakedness refers
to having sex]: they shall bear their sin; they shall die childless. And
if a man shall take his brother's wife, it is an unclean thing: he hath
uncovered his brother's nakedness; they shall be childless."
Deuteronomy 22:30 "A man shall not take his father's wife, nor
discover his father's skirt."
Luke 16:18 "Whosoever putts away his wife, and marries another,
commits adultery: and whosoever married her that is put away from her
husband commits adultery."
Matthew 19:3-12 " The Pharisees also came unto him, tempting
him, and saying unto him, Is it lawful for a man to put away his wife for
every cause? And he answered and said unto them, Have ye not read, that he
which made them at the beginning made them male and female, And said, For
this cause shall a man leave father and mother, and shall cleave to his
wife: and they twain shall be one flesh? Wherefore they are no more twain,
but one flesh. What therefore God hath joined together, let not man put
asunder. They say unto him, Why did Moses then command to give a writing of
divorcement, and to put her away? 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. And I say unto you, Whosoever shall put away his
wife, except it be for fornication, and shall marry another, commits
adultery: and whoso married her which is put away doth commit adultery.
His disciples say unto him, If the case of the man be so with his wife, it
is not good to marry. But he said unto them, All men cannot receive this
saying, save they to whom it is given. For there are some eunuchs, which
were so born from their mother's womb: and there are some eunuchs, which
were made eunuchs of men: and there be eunuchs, which have made themselves
eunuchs for the kingdom of heaven's sake. He that is able to receive it, let
him receive it."
Mark 10:4-12 " And the Pharisees came to him, and asked him, Is
it lawful for a man to put away his wife? tempting him. And he answered and
said unto them, What did Moses command you? And they said, Moses suffered to
write a bill of divorcement, and to put her away. And Jesus answered and
said unto them, For the hardness of your heart he wrote you this precept.
But from the beginning of the creation God made them male and female. For
this cause shall a man leave his father and mother, and cleave to his wife;
And they twain shall be one flesh: so then they are no more twain, but one
flesh. What therefore God hath joined together, let not man put asunder. And
in the house his disciples asked him again of the same matter. And he saith
unto them, Whosoever shall put away his wife, and marry another, commits
adultery against her. And if a woman shall put away her husband, and be
married to another, she commits adultery."