It wasnarrated from Abu Mujibah Al-Bahili that his father or, hispaternaluncle, said:
"I came to the Prophet (ﷺ) and said: 'OProphet ofAllah, I am the man who came to you last year.' He said:'Why doI see your body so thin (and weak)?' He said: 'O Messenger ofAllah! I do not eat during the day; I only eat at night.' He said:'Who commanded you to punish yourself?' I said: 'O Messenger ofAllah!I am strong enough.' He said: 'Fast the month of patience*and one dayafter it.' I said: 'I am strong enough (to do more).'He said: 'Fastthe month of patience and two days after it.' Isaid: 'I am strongenough (to do more).' He said: 'Fast themonth of patience and threedays after it, and fast the sacredmonths.'"
English reference: Vol. 1, Book 7, Hadith 1741
Arabic reference: Book 7, Hadith 1813