Jamieson, Fausset and Brown on Matthew 5:32

32. But I say unto you, That whosoever shall put away his wife, saving for the cause of fornication, causeth her to commit adultery--that is, drives her into it in case she marries again.

and whosoever shall marry her that is divorced--for anything short of conjugal infidelity.

committeth adultery--for if the commandment is broken by the one party, it must be by the other also. But see on Mt 19:4-9. Whether the innocent party, after a just divorce, may lawfully marry again, is not treated of here. The Church of Rome says, No; but the Greek and Protestant Churches allow it.

Same Subject Illustrated from the Third Commandment (Mt 5:33-37).