Sahih Muslim | Book 6 | Hadith Number 2461

Narrated by Humaid b. 'Abd al-Rahman
Humaid b. 'Abd al-Rahman reported that Abu Huraira had narrated to him that the Apostle of Allah (may peace be upon him) commanded the person (who) broke the fast in Ramadan to free a slave or observe fasts for two (consecutive) months or feed sixty poor persons.