The ruling on one who has intercourse with his wife during the day of Ramadan while forgetting or being ignorant

The questioner : What is the correct ruling for one who has intercourse with his wife during the day of Ramadan while forgetting or being ignorant? Does he have to pay an expiation or not?

The Shaykh : It appears that I will not answer this question unless the person who asked it was not present at the beginning of the lesson. Well, we have stated that all things that break the fast include intercourse. If a person is ignorant, forgetful, or not intending, then it does not break the fast. Accordingly, if a man has intercourse with his wife while forgetting, he owes nothing and his fast is valid. And if he has intercourse with her while ignorant—meaning he thinks the dawn has not yet appeared—he is not ignorant of the ruling, because I do not think anyone who has lived among Muslims is ignorant that intercourse for those fasting is forbidden. Everyone knows that it is forbidden. But the one who is ignorant regarding intercourse might be ignorant of the appearance of dawn; that is, he has intercourse with his wife at the end of the night while he does not think that the dawn has appeared, and then it turns out that it has. In that case, we say:
His fast is valid. Does he have to pay an expiation? No, he does not have to pay an expiation. Similarly, if he is having intercourse with his family and the call to prayer is made for the appearance of dawn, he must stop, and his fast is valid, and he does not have to pay an expiation.