Albert Barnes Commentary 1 Corinthians 7:5

"Defraud ye not one the other, except it be by consent for a season, that ye may give yourselves unto prayer, and may be together again, that Satan tempt you not because of your incontinency." — 1 Corinthians 7:5 (ASV)

Defraud ye not, etc. Meaning, the right mentioned above. Do not withdraw from the companionship of each other.

Except it be with consent. Meaning, with a mutual understanding, so that you may engage in the extraordinary duties of religion .

And come together again, etc. Even with mutual consent, the apostle did not intend for this separation to be perpetual, since it would expose them to many of the evils that the marriage relationship was designed to avoid.

That Satan, etc. Meaning, so that Satan does not take advantage of you, and throw you into temptation, and fill you with thoughts and passions that the marriage compact was designed to remedy.