Matthew 5:31-32
Concerning Divorce
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.
Matthew 19:1-9
Teaching about Divorce
19 Now when Jesus had finished these sayings, he went away from Galilee and entered the region of Judea beyond the Jordan; 2 and large crowds followed him, and he healed them there.
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.”