Matthew 19:1-6

1 And it came to pass that when Jesus had finished these words, he departed from Galilee and came into the borders of Judaea beyond the Jordan;

2 and a great multitude followed him, and he healed them there.

3 Then the Pharisees came unto him, tempting him and saying unto him, Is it lawful for a man to put away his wife for any cause?

4 And he answered and said unto them, Have ye not read, that he who made them at the beginning made them male and female?

5 And said, For this cause shall a man leave father and mother and shall be joined to his wife, and they shall be two in one flesh.

6 Therefore they are no longer two, but one flesh. What therefore God has joined together, let not man separate.