Mattityahu 19:8-10

Orthodox Jewish Bible

⁸ He says to them, Moshe, because of your hardness of heart, permitted you to give the get to your wives; but from bereshis (in the beginning), however, it was not so.

⁹ But I [Moshiach] say to you that whoever, the case of zenut (fornication) being excepted, gives the get to his wife and marries another, is guilty of niuf (adultery).

¹⁰ Moshiach’s talmidim say to him, If thus is the case of the man with the wife, nikhnas lchuppah (to be wed) is not advantageous.