(From the gospels)
3 And Pharisees came up to him and
tested him by asking, "Is it lawful to divorce one's wife for any cause?"
4 He answered, "Have you not read
that he who made them from the beginning made them male and female,
5 and said, 'For this reason a
man shall leave his father and mother and be joined to his wife, and the
two shall become one flesh'?
6 So they are no longer two but
one flesh. What therefore God has joined together, let not man put asunder."
7 They said to him, "Why then did
Moses command one to give a certificate of divorce, and to put her away?"
8 He said to them, "For your hardness
of heart Moses allowed you to divorce your wives, but from the beginning
it was not so.
9 And I say to you: whoever divorces
his wife, except for unchastity, and marries another, commits adultery."
27 "You have heard that it was said,
'You shall not commit adultery.'
28 But I say to you that every
one who looks at a woman lustfully has already committed adultery with
her in his heart.
31 "It was also said, 'Whoever
divorces his wife, let him give her a certificate of divorce.'
32 But I say to you that every
one who divorces his wife, except on the ground of unchastity, makes her
an adulteress; and whoever marries a divorced woman commits adultery.
(From the Koran)
33.49: O you who believe! when you
marry the believing women, then divorce them before you touch them, you
have in their case no term which you should reckon; so make some provision
for them and send them forth a goodly sending forth.
33.50: O Prophet! surely We have
made lawful to you your wives whom you have given their dowries, and those
whom your right hand possesses out of those whom Allah has given to you
as prisoners of war, and the daughters of your paternal uncles and the
daughters of your paternal aunts, and the daughters of your maternal uncles
and the daughters of your maternal aunts who fled with you; and a believing
woman if she gave herself to the Prophet, if the Prophet desired to marry
her -- specially for you, not for the (rest of) believers; We know what
We have ordained for them concerning their wives and those whom their right
hands possess in order that no blame may attach to you; and Allah is Forgiving,
33.51: You may put off whom you
please of them, and you may take to you whom you please, and whom you desire
of those whom you had separated provisionally; no blame attaches to you;
this is most proper, so that their eyes may be cool and they may not grieve,
and that they should be pleased, all of them with what you give them, and
Allah knows what is in your hearts; and Allah is Knowing, Forbearing.
The Koran contains many such verses.
Go to this link for a fuller, yet
incomplete, comparison of Jesus and Muhammad's teachings relative to marriage