Matthew 19:9-11

And I say unto you, Whosoever shall put away his wife, except for fornication, and shall marry another, committeth adultery: and he that marrieth her when she is put away committeth adultery. The disciples say unto him, If the case of the man is so with his wife, it is not expedient to marry. But he said unto them, Not all men can receive this saying, but they to whom it is given.