Matthew 19:7-8

7 They say to him, What then commanded Moses, to give a libel of forsaking, and to leave of. [They say to him, What then commanded Moses, to give a little book of forsaking, and to forsake.]

8 And he said to them, For Moses, for the hardness of your heart, suffered you to leave your wives [And he saith to them, For Moses, at the hardness of your heart, suffered you to forsake your wives]; but from the beginning it was not so.