1 Corinthians 7:5

So, if your husband or wife wants to sleep with you, to do what married people do together, you can’t say, “No.” But both of you can agree to wait for a while without sleeping together, so you can use the time to pray. Then, soon after that, you have to sleep together again. If you don’t, Satan might trick you. He knows you can’t control yourselves very well. If you go too long without sleeping together, then he will try to get one of you to sleep with somebody else.