Matthew 19:4

When Jesus had finished these words, he departed from Galilee and came into the borders of Judea beyond the Jordan.

Great multitudes followed him, and he healed them there.

Pharisees came to him, testing him and saying, “Is it lawful for a man to divorce his wife for any reason?”

and said, ‘For this cause a man shall leave his father and mother, and shall be joined to his wife; and the two shall become one flesh’?

So that they are no more two, but one flesh. What therefore God has joined together, don’t let man tear apart.”

They asked him, “Why then did Moses command us to give her a certificate of divorce and divorce her?”