This was a special concession for him. If a man commits this act today, the expiation is necessary for him.

Abu Dawud said: Al-Laith b. Sa'd, al-Awza'i, Mansur b. al-Mu'tamir and 'Irak b. Malik have narrated this tradition like the one narrated by Ibn 'Uyainah. Al-Awza'i narrated in his version the words: Beg pardon of Allah.
Sunan Abi Dawud Book 14, Hadith 79
← Previous Hadith A man came to the Prophet (ﷺ) and said: I am undone. He asked him: What has happened to you ? He said: I had intercourse with my wife in Ramadan (while I was fasting). He asked: Can you set a slave free ? He said: No. He again asked: Can you fast for two consecutive months ? He said: No. He asked: Can you provide food for sixty poor people ? He said: No. He said: Sit down. Then a huge basket containing dates ('araq) was brought to the Prophet (ﷺ). He then said to him: Give it as sadaqah (i.e. alms). He said: Messenger of Allah, there is no poorer family than mine between the two lave plains of it (Medina). The Messenger of Allah (ﷺ) laughed so that his eye-teeth became visible, and said: Give it to your family to eat. Musaddad said in another place: "his canine teeth".

Sunan Abi Dawud Book 14, Hadith 78 Next Hadith → (A man broke his fast intentionally) during Ramadan. The Messenger of Allah (ﷺ) commanded him to emancipate a slave, or fast for two months, or feed sixty poor men. He said: I cannot provide. The Messenger of Allah (ﷺ) said: Sit down. Thereafter a huge basket of dates ('araq) was brought to the Messenger of Allah (ﷺ). He said: Take this and give it as sadaqah (alms). He said: Messenger of Allah, there is no poorer than I. The Messenger of Allah (ﷺ) thereupon laughed so that his canine teeth became visible and said: Eat it yourself.

Abu Dawud said: Ibn Juraij narrated it from al-Zuhri in the wordings of the narrator Malik that a man broke his fast. This version says: You should either free a slave, or fast for two months, or provide food for sixty poor men.

Sunan Abi Dawud Book 14, Hadith 80